Re: [Qemu-devel] [PATCH 1.0 v3] configure: fix detection for xattr.h on modern distributions

[Anthony Liguori <anthony@codemonkey.ws>]

On 11/09/2011 06:44 AM, Avi Kivity wrote:
> 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: Avi Kivity<avi@redhat.com>

Applied.  Thanks.

Regards,

Anthony Liguori

> ---
>
> v3: fix misspelling of "qemu-xattr.h"
>
> v2: try for libc first, libattr second
>
>
>   configure                     |   12 ++++++++++--
>   hw/9pfs/virtio-9p-handle.c    |    2 +-
>   hw/9pfs/virtio-9p-local.c     |    2 +-
>   hw/9pfs/virtio-9p-posix-acl.c |    2 +-
>   hw/9pfs/virtio-9p-xattr.h     |    2 +-
>   linux-user/syscall.c          |    2 +-
>   qemu-xattr.h                  |   30 ++++++++++++++++++++++++++++++
>   7 files changed, 45 insertions(+), 7 deletions(-)
>   create mode 100644 qemu-xattr.h
>
> diff --git a/configure b/configure
> index 9e5da44..401d9a6 100755
> --- a/configure
> +++ b/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
> diff --git a/hw/9pfs/virtio-9p-handle.c b/hw/9pfs/virtio-9p-handle.c
> index c38e0e7..0a778b4 100644
> --- a/hw/9pfs/virtio-9p-handle.c
> +++ b/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
> diff --git a/hw/9pfs/virtio-9p-local.c b/hw/9pfs/virtio-9p-local.c
> index 782dc0a..7f1c089 100644
> --- a/hw/9pfs/virtio-9p-local.c
> +++ b/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>
> diff --git a/hw/9pfs/virtio-9p-posix-acl.c b/hw/9pfs/virtio-9p-posix-acl.c
> index f5b392e..a1948e3 100644
> --- a/hw/9pfs/virtio-9p-posix-acl.c
> +++ b/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"
> diff --git a/hw/9pfs/virtio-9p-xattr.h b/hw/9pfs/virtio-9p-xattr.h
> index 247e414..9437280 100644
> --- a/hw/9pfs/virtio-9p-xattr.h
> +++ b/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
>   {
> diff --git a/linux-user/syscall.c b/linux-user/syscall.c
> index 9f5da36..f227097 100644
> --- a/linux-user/syscall.c
> +++ b/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
> diff --git a/qemu-xattr.h b/qemu-xattr.h
> new file mode 100644
> index 0000000..f910d96
> --- /dev/null
> +++ b/qemu-xattr.h
> @@ -0,0 +1,30 @@
> +/*
> + * 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