From f6424ff7c289462467a0bd852b35442431ace60f Mon Sep 17 00:00:00 2001
From: Matthew Flatt <mflatt@racket-lang.org>
Date: Tue, 27 Mar 2018 13:33:49 -0600
Subject: [PATCH] Windows: adjust DLL embedding implementation

Define `__pfnDliNotifyHook2` instead of declaring it as `extern` seems
to make it work in more build environments.
---
 racket/src/start/embedded_dll.inc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/racket/src/start/embedded_dll.inc b/racket/src/start/embedded_dll.inc
index a68c576efc..30758eca08 100644
--- a/racket/src/start/embedded_dll.inc
+++ b/racket/src/start/embedded_dll.inc
@@ -10,7 +10,7 @@ typedef struct embedded_dll_entry_t {
 
 static embedded_dll_entry_t *embedded_dlls;
 
-extern void *__pfnDliNotifyHook2;
+void *__pfnDliNotifyHook2 = NULL;
 static FARPROC WINAPI delayHook(unsigned dliNotify, void *pdli);
 static HCUSTOMMODULE LoadLibraryHook(LPCSTR, void *);
 static FARPROC GetProcAddressHook(HCUSTOMMODULE, LPCSTR, void *);