From 14d367516504c0caedc6426fa3122a59e55584ca Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?M=C3=A5ns=20Rullg=C3=A5rd?= <mans@mansr.com>
Date: Sun, 17 Jan 2010 19:10:03 +0000
Subject: [PATCH] configure: add check_struct function

This adds a check_struct function to test for availability of a
member within a struct.

Originally committed as revision 21267 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 configure | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/configure b/configure
index cf3d51ac2c..391e0349aa 100755
--- a/configure
+++ b/configure
@@ -759,6 +759,24 @@ $type v;
 EOF
 }
 
+check_struct(){
+    log check_type "$@"
+    headers=$1
+    struct=$2
+    member=$3
+    shift 3
+    disable_safe "${struct}_${member}"
+    incs=""
+    for hdr in $headers; do
+        incs="$incs
+#include <$hdr>"
+    done
+    check_cc "$@" <<EOF && enable_safe "${struct}_${member}"
+$incs
+const void *p = &(($struct *)0)->$member;
+EOF
+}
+
 require(){
     name="$1"
     header="$2"