configure: fix detection for xattr.h on modern distributions

Modern distributions place xattr.h in /usr/include/sys, and fold
libattr.so into libc.  They also don't have an ENOATTR.

Make configure detect this, and add a qemu-xattr.h file that
directs the #include to the right place.
Signed-off-by: NAvi Kivity <avi@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

configure

@@ -129,6 +129,7 @@ xen=""
 xen_ctrl_version=""
 linux_aio=""
 attr=""
+libattr=""
 xfs=""
 
 vhost_net="no"
@@ -1961,12 +1962,16 @@ if test "$attr" != "no" ; then
   cat > $TMPC <<EOF
 #include <stdio.h>
 #include <sys/types.h>
-#include <attr/xattr.h>
+#include <sys/xattr.h>
 int main(void) { getxattr(NULL, NULL, NULL, 0); setxattr(NULL, NULL, NULL, 0, 0); return 0; }
 EOF
-  if compile_prog "" "-lattr" ; then
+  if compile_prog "" "" ; then
+    attr=yes
+  # Older distros have <attr/xattr.h>, and need -lattr:
+  elif sed -i s,sys/xattr,attr/xattr, $TMPC && compile_prog "" "-lattr" ; then
     attr=yes
     LIBS="-lattr $LIBS"
+    libattr=yes
   else
     if test "$attr" = "yes" ; then
       feature_not_found "ATTR"
@@ -3032,6 +3037,9 @@ fi
 if test "$attr" = "yes" ; then
   echo "CONFIG_ATTR=y" >> $config_host_mak
 fi
+if test "$libattr" = "yes" ; then
+  echo "CONFIG_LIBATTR=y" >> $config_host_mak
+fi
 if test "$linux" = "yes" ; then
   if test "$attr" = "yes" ; then
     echo "CONFIG_VIRTFS=y" >> $config_host_mak

hw/9pfs/virtio-9p-handle.c

@@ -19,7 +19,7 @@
 #include <grp.h>
 #include <sys/socket.h>
 #include <sys/un.h>
-#include <attr/xattr.h>
+#include "qemu-xattr.h"
 #include <unistd.h>
 #include <linux/fs.h>
 #ifdef CONFIG_LINUX_MAGIC_H

hw/9pfs/virtio-9p-local.c

@@ -19,7 +19,7 @@
 #include <grp.h>
 #include <sys/socket.h>
 #include <sys/un.h>
-#include <attr/xattr.h>
+#include "qemu-xattr.h"
 #include <linux/fs.h>
 #ifdef CONFIG_LINUX_MAGIC_H
 #include <linux/magic.h>

hw/9pfs/virtio-9p-posix-acl.c

@@ -12,7 +12,7 @@
  */
 
 #include <sys/types.h>
-#include <attr/xattr.h>
+#include "qemu-xattr.h"
 #include "hw/virtio.h"
 #include "virtio-9p.h"
 #include "fsdev/file-op-9p.h"

hw/9pfs/virtio-9p-xattr.h

@@ -13,7 +13,7 @@
 #ifndef _QEMU_VIRTIO_9P_XATTR_H
 #define _QEMU_VIRTIO_9P_XATTR_H
 
-#include <attr/xattr.h>
+#include "qemu-xattr.h"
 
 typedef struct xattr_operations
 {

linux-user/syscall.c

@@ -71,7 +71,7 @@ int __clone2(int (*fn)(void *), void *child_stack_base,
 #include <sys/epoll.h>
 #endif
 #ifdef CONFIG_ATTR
-#include <attr/xattr.h>
+#include "qemu-xattr.h"
 #endif
 
 #define termios host_termios

qemu-xattr.h

+/*
+ * Host xattr.h abstraction
+ *
+ * Copyright 2011 Red Hat Inc. and/or its affiliates
+ *
+ * Authors:
+ *  Avi Kivity <avi@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2, or any
+ * later version.  See the COPYING file in the top-level directory.
+ *
+ */
+#ifndef QEMU_XATTR_H
+#define QEMU_XATTR_H
+
+/*
+ * Modern distributions (e.g. Fedora 15, have no libattr.so, place attr.h
+ * in /usr/include/sys, and don't have ENOATTR.
+ */
+
+#include "config-host.h"
+
+#ifdef CONFIG_LIBATTR
+#  include <attr/xattr.h>
+#else
+#  define ENOATTR ENODATA
+#  include <sys/xattr.h>
+#endif
+
+#endif