diff -urN readline-5.2/configure.in readline-5.2-haiku/configure.in
--- readline-5.2/configure.in	2006-09-28 16:04:24.000000000 +0000
+++ readline-5.2-haiku/configure.in	2008-08-22 11:14:49.000000000 +0000
@@ -87,6 +87,9 @@
     i[[3456]]86-*-beos*)
         cross_cache=${srcdir}/cross-build/x86-beos.cache
         ;;
+    i[[3456]]86-*-haiku*)
+        cross_cache=${srcdir}/cross-build/x86-haiku.cache
+        ;;
     *)  echo "configure: cross-compiling for $host is not supported" >&2
         ;;
     esac
diff -urN readline-5.2/histfile.c readline-5.2-haiku/histfile.c
--- readline-5.2/histfile.c	2006-03-31 20:48:43.000000000 +0000
+++ readline-5.2-haiku/histfile.c	2008-08-22 10:45:20.000000000 +0000
@@ -400,7 +400,7 @@
     {
       write (file, bp, chars_read - (bp - buffer));
 
-#if defined (__BEOS__)
+#if defined (__BEOS__) && !defined(__HAIKU__)
       /* BeOS ignores O_TRUNC. */
       ftruncate (file, chars_read - (bp - buffer));
 #endif
diff -urN readline-5.2/input.c readline-5.2-haiku/input.c
--- readline-5.2/input.c	2006-08-16 19:15:16.000000000 +0000
+++ readline-5.2-haiku/input.c	2008-08-22 11:08:52.000000000 +0000
@@ -471,7 +471,7 @@
       if (result == 0)
 	return (EOF);
 
-#if defined (__BEOS__)
+#if defined (__BEOS__) && !defined(__HAIKU__)
       if (errno == EINTR)
 	continue;
 #endif