Re: [Qemu-devel] [PATCH v1 3/8] net: Only show vhost-user in the help text if CONFIG_POSIX is defined

[Paolo Bonzini <pbonzini@redhat.com>]

On 19/02/2018 10:15, Thomas Huth wrote:
> According to net/Makefile.objs we only link in the vhost-user code
> if CONFIG_POSIX has been set. So the help screen should also only
> show this information if CONFIG_POSIX has been defined.
> 
> Signed-off-by: Thomas Huth <thuth@redhat.com>
> ---
>  qemu-options.hx | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/qemu-options.hx b/qemu-options.hx
> index 5050a49..b81b53b 100644
> --- a/qemu-options.hx
> +++ b/qemu-options.hx
> @@ -1998,8 +1998,10 @@ DEF("netdev", HAS_ARG, QEMU_OPTION_netdev,
>      "                VALE port (created on the fly) called 'name' ('nmname' is name of the \n"
>      "                netmap device, defaults to '/dev/netmap')\n"
>  #endif
> +#ifdef CONFIG_POSIX
>      "-netdev vhost-user,id=str,chardev=dev[,vhostforce=on|off]\n"
>      "                configure a vhost-user network, backed by a chardev 'dev'\n"
> +#endif
>      "-netdev hubport,id=str,hubid=n[,netdev=nd]\n"
>      "                configure a hub port on QEMU VLAN 'n'\n", QEMU_ARCH_ALL)
>  DEF("net", HAS_ARG, QEMU_OPTION_net,
> 


I would have thought that #ifdef is not allowed within macro arguments,
but there is an obvious precedent right in the context, so:

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>