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Re: [Xen-devel] [PATCH v1] xen: preserve COMPAT in CFLAGS



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On Fri, Oct 26, Olaf Hering wrote:

> A given Qemu version can not predict what version of Xen it will run on.
> There are some checks in configure to decide what Xen libraries and
> functions are available. How exactly these functions must be accessed
> has to be decided by configure and the user who is compiling Qemu.
> In no way some random header file must override this decision.
> 
> Remove the breakage introduced by commit 5eeb39c24b, which would always
> hide the libxc interfaces the given version of Qemu knows about.
> 
> The current symptom of such breakage is a build failure with qemu-2.9
> and older, in combination with Xen 4.12.
> 
> Fixes: 5eeb39c24b7d4da5d129bfdd9c4fd21cfb3d28d6
> Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
> ---
>  include/hw/xen/xen_common.h | 9 ---------
>  1 file changed, 9 deletions(-)
> 
> diff --git a/include/hw/xen/xen_common.h b/include/hw/xen/xen_common.h
> index 5f1402b494..33fa2d3497 100644
> --- a/include/hw/xen/xen_common.h
> +++ b/include/hw/xen/xen_common.h
> @@ -1,15 +1,6 @@
>  #ifndef QEMU_HW_XEN_COMMON_H
>  #define QEMU_HW_XEN_COMMON_H
>  
> -/*
> - * If we have new enough libxenctrl then we do not want/need these compat
> - * interfaces, despite what the user supplied cflags might say. They
> - * must be undefined before including xenctrl.h
> - */
> -#undef XC_WANT_COMPAT_EVTCHN_API
> -#undef XC_WANT_COMPAT_GNTTAB_API
> -#undef XC_WANT_COMPAT_MAP_FOREIGN_API
> -
>  #include <xenctrl.h>
>  #include <xenstore.h>
>  #include <xen/io/xenbus.h>
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxxx
> https://lists.xenproject.org/mailman/listinfo/xen-devel

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