[PATCH v0] Fix broken Xen support in configure.ac

[Daniel Kiper]

On Fri, Apr 07, 2017 at 09:13:06AM -0500, Eric DeVolder wrote:
> Commit 2cf7cb9a "kexec: implemented XEN KEXEC STATUS to determine
> if an image is loaded" added configure-time detection of the
> kexec_status() call, but in doing so had the unintended side
> effect of disabling support for Xen altogether due to the
> missing HAVE_LIBXENCTRL=1. This corrects the broken behavior
> while still maintaining the original intention of detecting
> support for kexec_status() call.

In general Reviewed-by: Daniel Kiper <daniel.kiper at oracle.com>
but two nitpicks.

You do not need v0 in subject if you post first patch. Plain
"[PATCH]" (of course without quotes) is sufficient.

> ---
> Broken behavior (HAVE_LIBXENCTRL is missing altogether):
>   ...
>   checking xenctrl.h usability... yes
>   checking xenctrl.h presence... yes
>   checking for xenctrl.h... yes
>   checking for xc_kexec_load in -lxenctrl... yes
>   checking for xc_kexec_status in -lxenctrl... yes
>
>   in include/config.h:
>   /* The kexec_status call is available */
>   #define HAVE_KEXEC_CMD_STATUS 1
>
> Fixed behaviour (restores HAVE_LIBXENCTRL):
>   ...
>   checking xenctrl.h usability... yes
>   checking xenctrl.h presence... yes
>   checking for xenctrl.h... yes
>   checking for xc_kexec_load in -lxenctrl... yes
>   checking for xc_kexec_status in -lxenctrl... yes
>
>   in include/config.h:
>   /* The kexec_status call is available */
>   #define HAVE_KEXEC_CMD_STATUS 1
>   /* Define to 1 if you have the `xenctrl' library (-lxenctrl). */
>   #define HAVE_LIBXENCTRL 1
>
> Reported-and-Tested-by: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com>
> Signed-off-by: Eric DeVolder <eric.devolder at oracle.com>

Reported-and-Tested-by, Signed-off-by et consortes should be just
before first "---". Otherwise "git am" will drop all of them.

Daniel