[PATCH] vsh: Define HAVE_STDARG_H before including readline

[Pavel Hrdina]

On Wed, Sep 02, 2020 at 05:47:43PM +0200, Michal Privoznik wrote:
> As it turned out my previous commits which switched from HAVE_ to
> WITH_ and dropped stdarg.h detection were a bit too aggressive.
> Because of reasons described in 9ea3424a178 we need to define
> HAVE_STDARG_H before including readline otherwise macos build
> fails. Honestly, I still don't fully understand the problem so I
> am not going to bother you with "explanation".
> 
> Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
> ---
>  tools/vsh.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/tools/vsh.c b/tools/vsh.c
> index 11f493f969..d063a7f8cb 100644
> --- a/tools/vsh.c
> +++ b/tools/vsh.c
> @@ -30,6 +30,10 @@
>  #include <signal.h>
>  
>  #if WITH_READLINE
> +/* In order to have proper rl_message declaration with older
> + * versions of readline, we have to declare this. See 9ea3424a178
> + * for more info. */
> +# define HAVE_STDARG_H
>  # include <readline/readline.h>
>  # include <readline/history.h>
>  #endif

Is this enough to fix the issue? As we include readline.h in virsh.c and
virt-admin.c as well.

Pavel
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