From c9d8a2406d6da4642c7f29dd3229bd0ec875b49f Mon Sep 17 00:00:00 2001
From: rakshasa <sundell.software@gmail.com>
Date: Fri, 27 Oct 2006 13:07:36 +0000
Subject: [PATCH] * Added symbol export attributes to the API and made the rest
 hidden by default.

git-svn-id: svn://rakshasa.no/libtorrent/trunk/rtorrent@798 e378c898-3ddf-0310-93e7-cc216c733640
---
 scripts/attributes.m4 | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/scripts/attributes.m4 b/scripts/attributes.m4
index a153f528..d04449b7 100644
--- a/scripts/attributes.m4
+++ b/scripts/attributes.m4
@@ -58,6 +58,25 @@ AC_DEFUN([CC_ATTRIBUTE_INTERNAL], [
 	fi
 ])
 
+AC_DEFUN([CC_ATTRIBUTE_DEFAULT], [
+	AC_CACHE_CHECK([if compiler supports __attribute__((visibility("default")))],
+		[cc_cv_attribute_default],
+		[AC_COMPILE_IFELSE([
+			void __attribute__((visibility("default"))) default_function() { }
+			],
+			[cc_cv_attribute_default=yes],
+			[cc_cv_attribute_default=no])
+		])
+	
+	if test "x$cc_cv_attribute_default" = "xyes"; then
+		AC_DEFINE([SUPPORT_ATTRIBUTE_DEFAULT], 1, [Define this if the compiler supports the default visibility attribute])
+		$1
+	else
+		true
+		$2
+	fi
+])
+
 AC_DEFUN([CC_ATTRIBUTE_NONNULL], [
 	AC_CACHE_CHECK([if compiler supports __attribute__((nonnull()))],
 		[cc_cv_attribute_nonnull],