From 6d267c26d3a453efd44f6254366c00168daccb89 Mon Sep 17 00:00:00 2001
From: Sylvain Corlay <sylvain.corlay@gmail.com>
Date: Mon, 4 Apr 2016 13:58:53 -0400
Subject: [PATCH] -fvisibility=hidden

---
 setup.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/setup.py b/setup.py
index a466e26..3447ac5 100644
--- a/setup.py
+++ b/setup.py
@@ -53,6 +53,8 @@ class BuildExt(build_ext):
         opts = self.c_opts.get(ct, [])
         if ct == 'unix':
             opts.append(cpp_flag(self.compiler))
+            if has_flag(self.compiler, '-fvisibility=hidden'):
+                opts.append('-fvisibility=hidden')
         for ext in self.extensions:
             ext.extra_compile_args = opts
         build_ext.build_extensions(self)