Instructions related to FlexDLL.doc_windows_unicode

1 files changed, 9 insertions, 3 deletions

diff --git a/README.win32.adoc b/README.win32.adoc
index 33b406e4c7..919dd1f00a 100644
--- a/README.win32.adoc
+++ b/README.win32.adoc
@@ -73,9 +73,10 @@ https://github.com/alainfrisch/flexdll. A binary distribution is available;
 instructions on how to build FlexDLL from sources, including how to bootstrap
 FlexDLL and OCaml are given <<seflexdll,later in this document>>.  Unless you
 bootstrap FlexDLL, you will need to ensure that the directory to which you
-install FlexDLL is included in your `PATH` environment variable. Note: if you
-use Visual Studio 2015 or Visual Studio 2017, the binary distribution of
-FlexDLL will not work and you must build it from sources.
+install FlexDLL is included in your `PATH` environment variable. Note: binary distributions
+of FlexDLL are compatible only with certain versions of Visual Studio; for instance
+version 0.36 of FlexDLL require Visual Studio 2015 or above, while earlier versions
+require older versions of Visual Studio.
 
 The base bytecode system (ocamlc, ocaml, ocamllex, ocamlyacc, ...) of all three
 ports runs without any additional tools.
@@ -383,6 +384,11 @@ The legacy mode will be deprecated and then removed in future versions
 of OCaml.  Users are thus strongly encouraged to use the Unicode mode
 and adapt their existing code bases accordingly.
 
+Note: in order for ocaml tools to support Unicode pathnames, it is
+necessary to use a version of FlexDLL which has itself been compiled
+with OCaml >= 3.06 in Unicode mode.  This is the case for binary distributions
+of FlexDLL starting from version 0.36 and above.
+
 == Trademarks
 
 Microsoft, Visual C++, Visual Studio and Windows are registered trademarks of