Add comment about --ignoreos in upgrade instructions

diff --git a/doc/html/upgrade-tinyos.html b/doc/html/upgrade-tinyos.html
index df4fcb77413b8c4cf0ee03e9bb7ac2b549666260..97a630b71084317915078e0f3214b3ea882a20fc 100644 (file)
--- a/doc/html/upgrade-tinyos.html
+++ b/doc/html/upgrade-tinyos.html
@@ -163,7 +163,11 @@ get strange errors when you try to compile TinyOS programs,
 such as the error message "the procedure entry point basename could not be located
 in the dynamic link library cygwin1.dll", this is likely due
 to a Cygwin version incompatibility: try the "Other" Windows/Cygwin 
-RPM (1.2.7a).
+RPM. If you are using Cygwin and installing the nesC RPM 
+causes an error that the RPM was built for Cygwin, add the <tt>--ignoreos</tt>
+option.
+
+
 
 <p>