Documented NANOPB_INTERNALS compilation option

diff --git a/docs/reference.rst b/docs/reference.rst
index 8c1af77..42e7c76 100644 (file)
--- a/docs/reference.rst
+++ b/docs/reference.rst
@@ -11,6 +11,7 @@ Compilation options
 The following options can be specified using -D switch given to the C compiler:
 
 :__BIG_ENDIAN__: Set this if your platform stores integers and floats in big-endian format. Mixed-endian systems (different layout for ints and floats) are currently not supported.
+:NANOPB_INTERNALS: Set this to expose the field encoder functions that are hidden since nanopb-0.1.3.
 
 pb.h
 ====