Index: subversion/bindings/swig/INSTALL
===================================================================
--- subversion/bindings/swig/INSTALL	(revision 1868723)
+++ subversion/bindings/swig/INSTALL	(working copy)
@@ -64,15 +64,24 @@
 BUILDING SWIG BINDINGS FOR SVN ON UNIX
 
 
-Step 1:  Install a suitable version of SWIG (which is
-         currently SWIG version 1.3.24 or later).
+Step 1:  Install a suitable version of SWIG
 
+    * Currently supported SWIG version is 1.3.24 and later, however,
+      - Python bindings doesn't support SWIG 4.0.0 and later (yet).
+      - Python 3 support for Python bindings requires SWIG 3.0.10 and later,
+        in 3.0.x.
+      - Python bindings doesn't support SWIG 3.0.9
+      - Ruby bindings doesn't support SWIG 3.0.8.
+      - Make sure language specific supported version of SWIG itself, e.g.
+        - Perl 5.16 and later requires SWIG 2.0.8 and later. 
+
     * Perhaps your distribution packages a suitable version - if it does
       install it, and skip to the last bullet point in this section.
 
     * Go to http://www.swig.org/, download the source tarball, and unpack.
 
-    * In the SWIG-1.3.xx directory, run ./configure.
+    * In the swig-x.y.z, directory, run ./configure (where x.y.z is
+      SWIG version, e.g. 3.0.12).
 
         If you plan to build the Python bindings, and have a system
         with more than one version of Python installed, you may need
@@ -95,13 +104,13 @@
         Run 'make && make install'
 
     * To verify you have SWIG installed correctly, run "swig -version"
-      from the command line. SWIG should report that it is version 1.3.24
-      or newer.
+      from the command line. SWIG should report that it is suitable version
+      mentioned above.
 
 Step 1a: Install py3c library if building Python SWIG bindings.
 
-    * Check your distribution packages first for a suitable version, and if found
-      install from there.
+    * Check your distribution packages first for a suitable version, and
+      if found install from there.
 
     * To install from source, download the latest release from
       https://github.com/encukou/py3c.