Add missing extern "C".
Change-Id: Idbf24ce8482ff03f24caa89bafb08677b1c5cec3
diff --git a/libc/bionic/pthread_debug.cpp b/libc/bionic/pthread_debug.cpp
index c557211..7d98d10 100644
--- a/libc/bionic/pthread_debug.cpp
+++ b/libc/bionic/pthread_debug.cpp
@@ -272,8 +272,8 @@
/****************************************************************************/
-extern int pthread_mutex_lock_impl(pthread_mutex_t *mutex);
-extern int pthread_mutex_unlock_impl(pthread_mutex_t *mutex);
+extern "C" int pthread_mutex_lock_impl(pthread_mutex_t *mutex);
+extern "C" int pthread_mutex_unlock_impl(pthread_mutex_t *mutex);
static int pthread_mutex_lock_unchecked(pthread_mutex_t *mutex) {
return pthread_mutex_lock_impl(mutex);