From a3c4469b1fad03cf7140d03045b0bfb301a72189 Mon Sep 17 00:00:00 2001
From: Angus Gratton <gus@projectgus.com>
Date: Tue, 16 Jun 2015 16:23:36 +1000
Subject: [PATCH] Add a linker script comment for all the patched newlib
 _lock_xxx symbols

---
 ld/eagle.app.v6.ld | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/ld/eagle.app.v6.ld b/ld/eagle.app.v6.ld
index 173db63..3505fb8 100644
--- a/ld/eagle.app.v6.ld
+++ b/ld/eagle.app.v6.ld
@@ -11,6 +11,13 @@
 pvPortMalloc = malloc;
 vPortFree = free;
 
+/* FreeRTOS lock functions.
+
+   Rely on a patch to libc that produces weak linked versions of the
+   below symbols. Currently treating locking primitives like universal
+   global critical section rather than individual locks, but this seems
+   OK from the use cases in newlib.
+*/
 _lock_acquire = vPortEnterCritical;
 _lock_acquire_recursive = vPortEnterCritical;
 _lock_try_acquire = vPortEnterCritical;