From f1dbd2909e864deaedd35482acda73ef2dbf8882 Mon Sep 17 00:00:00 2001
From: Damien George <damien.p.george@gmail.com>
Date: Thu, 5 May 2016 11:00:19 +0000
Subject: [PATCH] unix/gccollect: Provide declaration of exported function.

---
 unix/gccollect.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/unix/gccollect.c b/unix/gccollect.c
index 3e012b542..397c4ffe1 100644
--- a/unix/gccollect.c
+++ b/unix/gccollect.c
@@ -136,6 +136,9 @@ STATIC void gc_helper_get_regs(regs_t arr) {
 
 #endif // MICROPY_GCREGS_SETJMP
 
+// this function is used by mpthreadport.c
+void gc_collect_regs_and_stack(void);
+
 void gc_collect_regs_and_stack(void) {
     regs_t regs;
     gc_helper_get_regs(regs);
-- 
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