From 1a819f005385328d01b5393a5f21ab31828d63a7 Mon Sep 17 00:00:00 2001
From: James Zern <jzern@google.com>
Date: Mon, 14 Dec 2015 23:45:12 -0800
Subject: [PATCH] makefile.unix: make visibility=hidden the default

Change-Id: I22739f4db798bb95591839835b5368944396e887
---
 makefile.unix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/makefile.unix b/makefile.unix
index 53821377..10defa18 100644
--- a/makefile.unix
+++ b/makefile.unix
@@ -61,6 +61,9 @@ endif
 EXTRA_FLAGS += -DWEBP_USE_THREAD
 EXTRA_LIBS += -lpthread
 
+# Control symbol visibility. Comment out if your compiler doesn't support it.
+EXTRA_FLAGS += -fvisibility=hidden
+
 # Extra flags to emulate C89 strictness with the full ANSI
 EXTRA_FLAGS += -Wextra -Wold-style-definition
 EXTRA_FLAGS += -Wmissing-prototypes