--- Coro-Multicore/perlmulticore.h	2015/06/28 18:33:13	1.7
+++ Coro-Multicore/perlmulticore.h	2015/06/28 18:43:17	1.9
@@ -302,6 +302,20 @@
 
 =back
 
+
+=head1 DISABLING PERL MULTICORE AT COMPILE TIME
+
+You can disable the complete perl multicore API by defining the
+symbol C<PERL_MULTICORE_DISABLE> to C<1> (e.g. by specifying
+F<-DPERL_MULTICORE_DISABLE> as compiler argument).
+
+This will leave no traces of the API in the compiled code, suitable
+"empty" C<perl_release> and C<perl_acquire> definitions will be provided.
+
+This could be added to perl's C<CPPFLAGS> when configuring perl on
+platforms that do not support threading at all for example.
+
+
 =head1 AUTHOR
 
    Marc A. Lehmann <perlmulticore@schmorp.de>
@@ -318,6 +332,9 @@
 
 */
 
+#define PERL_MULTICORE_MAJOR 1 /* bumped on incompatible changes */
+#define PERL_MULTICORE_MINOR 0 /* bumped on every change */
+
 #if PERL_MULTICORE_DISABLE
 
 #define perlinterp_release() do { } while (0)