1 files changed, 14 insertions, 5 deletions
diff --git a/dmyext.c b/dmyext.c
index 34ea7a02f4..66be95ab4e 100644
--- a/dmyext.c
+++ b/dmyext.c
@@ -1,9 +1,18 @@
-void
-Init_ext(void)
-{
-}
+// This file is used by dynamically-linked ruby, which has no
+// statically-linked extension libraries.
+//
+// - miniruby does not use this Init_ext. Instead, "miniinit.c"
+//   provides Init_enc, which does nothing too. It does not support
+//   require'ing extension libraries.
+//
+// - Dynamically-linked ruby uses this Init_ext, which does
+//   nothing. It loads extension libraries by dlopen, etc.
+//
+// - Statically-linked ruby does not use this Init_ext. Instead,
+//   "ext/extinit.c" (which is a generated file) defines Init_ext,
+//   which activates the (statically-linked) extension libraries.
 
 void
-Init_enc(void)
+Init_ext(void)
 {
 }