From c0b6aede3d142caf4f7d5af9fbb3ec32efc6b57c Mon Sep 17 00:00:00 2001
From: Chow Loong Jin
Date: Fri, 3 Oct 2014 13:31:48 +0200
Subject: Use -fvisibility=hidden to avoid exporting non-public symbols

---
 configure.ac | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 93c01c5..09266fd 100644
--- a/configure.ac
+++ b/configure.ac
@@ -81,9 +81,14 @@ if test "x$win32" != "xtrue"; then
   AC_CHECK_LIB(pthread, [pthread_create, pthread_mutex_lock], [AC_SUBST(libpthread_LIBS,[-lpthread])], [AC_MSG_ERROR([libpthread is required to build libusbmuxd])])
 fi
 
-AS_COMPILER_FLAGS(GLOBAL_CFLAGS, "-Wall -Wextra -Wmissing-declarations -Wredundant-decls -Wshadow -Wpointer-arith  -Wwrite-strings -Wswitch-default -Wno-unused-parameter")
+AS_COMPILER_FLAGS(GLOBAL_CFLAGS, "-Wall -Wextra -Wmissing-declarations -Wredundant-decls -Wshadow -Wpointer-arith  -Wwrite-strings -Wswitch-default -Wno-unused-parameter -fvisibility=hidden")
 AC_SUBST(GLOBAL_CFLAGS)
 
+case "$GLOBAL_CFLAGS" in
+    *-fvisibility=hidden*)
+        AC_DEFINE([HAVE_FVISIBILITY], [1], [Define if compiled with -fvisibility=hidden])
+esac
+
 m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])
 
 AC_OUTPUT([
-- 
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