From ba90c7eb0ab1e068a06b28d40f4e0fc0a538873b Mon Sep 17 00:00:00 2001
From: Carlo Bramini <carlo.bramix@libero.it>
Date: Tue, 29 May 2012 09:26:56 +0300
Subject: Check if compiler supports __attribute__((weak))

---
 m4/attributes.m4 | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'm4')

diff --git a/m4/attributes.m4 b/m4/attributes.m4
index 3d9c256a0..4e613f23a 100644
--- a/m4/attributes.m4
+++ b/m4/attributes.m4
@@ -218,6 +218,13 @@ AC_DEFUN([CC_ATTRIBUTE_SENTINEL], [
     [$1], [$2])
 ])
 
+AC_DEFUN([CC_ATTRIBUTE_WEAK], [
+  CC_CHECK_ATTRIBUTE(
+    [weak], ,
+    [void some_function(void *, int) __attribute__((weak));],
+    [$1], [$2])
+])
+
 AC_DEFUN([CC_ATTRIBUTE_DEPRECATED], [
   CC_CHECK_ATTRIBUTE(
     [deprecated], ,
-- 
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