Re: [Xen-devel] [PATCH] libxl: Introduce LIBXL_DOMAIN_TYPE_INVALID to make gcc happy

[Christoph Egger <Christoph.Egger@xxxxxxx>]

On 05/22/12 18:18, Dario Faggioli wrote:

> On Tue, 2012-05-22 at 16:07 +0100, Ian Campbell wrote:
>>>> I did, I guess we need to check that all callers can cope with this new
>>>> return value though?
>>>>
>>> Sure, that was only to be sure I got what you were saying. :-)
>>>
>>> What I'm not getting right now is whether or not a proper patch doing
>>> such is still interesting or not? Also, how come am I almost the only
>>> one seeing that issue? Does it relate to gcc version? :-O
>>
>> There's been a handful of other reports this week. It does seem to be to
>> do with gcc version, yes.
>>
> Ok then, I didn't notice that. I went through the callers and they seem
> to be fine with the change, as the return type of the function is pretty
> much always converted to the enum (i.e., libxl_domain_type) and used in
> a switch with a proper 'default' clause, in case they care about
> something different from _HVM or _PV.
> 
> So, the below is what I'm using to build (and run) these days... Or was
> it something different that you meant when saying "check that all
> callers can cope with this" ?
> 
> (I can repost as a separate mail if wanted)
> 
> Dario
> 
> 8<---------------------------
> 
> libxl: make libxl__domain_type return 'int'
> 
> To avoid gcc > 4.6.3  complaining about:


I have gcc 4.5.3 and see this.
Christoph

> 
> libxl.c: In function âlibxl_primary_console_execâ:
> libxl.c:1233:9: error: case value â4294967295â not in enumerated type 
> âlibxl_domain_typeâ [-Werror=switch]
> 
> Callers have been checked and are fine with the change.
> 
> Signed-off-by: Dario Faggioli <dario.faggioli@xxxxxxxxxx>
> 
> diff -r 6dc80df50fa8 tools/libxl/libxl_dom.c
> --- a/tools/libxl/libxl_dom.c Tue May 22 16:30:11 2012 +0200
> +++ b/tools/libxl/libxl_dom.c Tue May 22 18:06:41 2012 +0200
> @@ -25,7 +25,7 @@
>  
>  #include "libxl_internal.h"
>  
> -libxl_domain_type libxl__domain_type(libxl__gc *gc, uint32_t domid)
> +int libxl__domain_type(libxl__gc *gc, uint32_t domid)
>  {
>      libxl_ctx *ctx = libxl__gc_owner(gc);
>      xc_domaininfo_t info;
> diff -r 6dc80df50fa8 tools/libxl/libxl_internal.h
> --- a/tools/libxl/libxl_internal.h    Tue May 22 16:30:11 2012 +0200
> +++ b/tools/libxl/libxl_internal.h    Tue May 22 18:06:41 2012 +0200
> @@ -714,7 +714,7 @@ int libxl__self_pipe_eatall(int fd); /* 
>  
>  
>  /* from xl_dom */
> -_hidden libxl_domain_type libxl__domain_type(libxl__gc *gc, uint32_t domid);
> +_hidden int libxl__domain_type(libxl__gc *gc, uint32_t domid);
>  _hidden int libxl__domain_shutdown_reason(libxl__gc *gc, uint32_t domid);
>  _hidden int libxl__sched_set_params(libxl__gc *gc, uint32_t domid, 
> libxl_sched_params *scparams);
>  #define LIBXL__DOMAIN_IS_TYPE(gc, domid, type) \
> 
> 



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