intrpvar.h: Add comment about PERLVARI

diff --git a/intrpvar.h b/intrpvar.h
index b45088f..32a013a 100644 (file)
--- a/intrpvar.h
+++ b/intrpvar.h
@@ -25,7 +25,8 @@
 
 /* The 'I' prefix is only needed for vars that need appropriate #defines
  * generated when built with or without MULTIPLICITY.  It is also used
- * to generate the appropriate export list for win32.
+ * to generate the appropriate export list for win32.  If the variable
+ * needs to be initialized, use PERLVARI.
  *
  * When building without MULTIPLICITY, these variables will be truly global.
  *