Add DEC Ultrix notes (from Donn Cave's email).

diff --git a/README b/README
index eacc4eea7fca7e040867efda9341d5307ac6bb33..3e0c6e91ac8487167308322c44b89a3b9355fd38 100644 (file)
--- a/README
+++ b/README
@@ -203,6 +203,9 @@ DEC Unix: When enabling threads, use --with-dec-threads, not
        reported for GCC 2.7.2.3 on selectmodule.c.  Manually compile
        the affected file without optimization to solve the problem.
 
+DEC Ultrix: compile with GCC to avoid bugs in the native compiler,
+       and pass SHELL=/bin/sh5 to Make when installing.
+
 AIX:   A complete overhaul of the shared library support is now in
        place.  See Misc/AIX-NOTES for some notes on how it's done.
        (The optimizer bug reported at this place in previous releases