From 236cf49670d1a4995e0494675ee4fbf155e6f90a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alexander=20F=C3=A6r=C3=B8y?= <ahf@torproject.org>
Date: Tue, 25 Apr 2017 17:51:58 +0200
Subject: [PATCH] Add stub function for libor-trace.

OS X's ar(1) doesn't allow us to create an archive with no object files.
This patch adds a stub file with a stub function in it to make OS X
happy again.
---
 src/trace/include.am |  8 +++++---
 src/trace/trace.c    | 11 +++++++++++
 src/trace/trace.h    | 10 ++++++++++
 3 files changed, 26 insertions(+), 3 deletions(-)
 create mode 100644 src/trace/trace.c
 create mode 100644 src/trace/trace.h

diff --git a/src/trace/include.am b/src/trace/include.am
index f7de1fb11..3285b04de 100644
--- a/src/trace/include.am
+++ b/src/trace/include.am
@@ -3,15 +3,17 @@
 AM_CPPFLAGS += -I$(srcdir)/src
 
 noinst_LIBRARIES += \
-  src/trace/libor-trace.a
-LIBOR_TRACE_A_SOURCES =
+	src/trace/libor-trace.a
+LIBOR_TRACE_A_SOURCES = \
+	src/trace/trace.c
 
 TRACEHEADERS = \
+	src/trace/trace.h \
 	src/trace/events.h
 
 if USE_EVENT_TRACING_DEBUG
 TRACEHEADERS += \
-  src/trace/debug.h
+	src/trace/debug.h
 endif
 
 # Library source files.
diff --git a/src/trace/trace.c b/src/trace/trace.c
new file mode 100644
index 000000000..fcdb80091
--- /dev/null
+++ b/src/trace/trace.c
@@ -0,0 +1,11 @@
+/* Copyright (c) 2017, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#include "trace.h"
+
+/** Initialize the tracing library. */
+void
+tor_trace_init(void)
+{
+}
+
diff --git a/src/trace/trace.h b/src/trace/trace.h
new file mode 100644
index 000000000..28fcd8eea
--- /dev/null
+++ b/src/trace/trace.h
@@ -0,0 +1,10 @@
+/* Copyright (c) 2017, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#ifndef TOR_TRACE_TRACE_H
+#define TOR_TRACE_TRACE_H
+
+void tor_trace_init(void);
+
+#endif // TOR_TRACE_TRACE_H
+