From fc910cb9a0b5a1ecd8b1f4c1c10ca54e2e433aa7 Mon Sep 17 00:00:00 2001
From: Howard Hinnant <hhinnant@apple.com>
Date: Sat, 21 Sep 2013 21:26:37 +0000
Subject: [PATCH] Peter Collingbourne:  Fix warnings when compiling with
 -DNDEBUG.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@191148 91177308-0d34-0410-b5e6-96231b3b80d8
---
 src/mutex.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/mutex.cpp b/src/mutex.cpp
index 42195aa8..07678978 100644
--- a/src/mutex.cpp
+++ b/src/mutex.cpp
@@ -42,6 +42,7 @@ void
 mutex::unlock() _NOEXCEPT
 {
     int ec = pthread_mutex_unlock(&__m_);
+    (void)ec;
     assert(ec == 0);
 }
 
@@ -79,6 +80,7 @@ fail:
 recursive_mutex::~recursive_mutex()
 {
     int e = pthread_mutex_destroy(&__m_);
+    (void)e;
     assert(e == 0);
 }
 
@@ -94,6 +96,7 @@ void
 recursive_mutex::unlock() _NOEXCEPT
 {
     int e = pthread_mutex_unlock(&__m_);
+    (void)e;
     assert(e == 0);
 }