[PATCH] virhostcpu: Fix build with clang and newest kernel headers

Jiri Denemark jdenemar at redhat.com
Tue Aug 23 14:21:05 UTC 2022


On Tue, Aug 23, 2022 at 16:15:54 +0200, Peter Krempa wrote:
> The most recent environment e.g. present in our Fedora Rawhide builds
> fail to build the tree with clang with the following error:
> 
> ../src/util/virhostcpu.c:1291:25: error: field 'header' with variable sized type 'struct kvm_msrs' not at the end of a struct or class is a GNU extension [-Werror,-Wgnu-variable-sized-type-not-at-end]
>         struct kvm_msrs header;
>                         ^
> 
> The problem seems to be that clang doesn't like the new way the
> 'entries' field in struct kvm_msrs is declared.
> 
> To work around the issue we can simply allocate the variable dynamically
> and use the 'entries' member as it was intended to to access the
> members.
> 
> Signed-off-by: Peter Krempa <pkrempa at redhat.com>
> ---
>  src/util/virhostcpu.c | 15 ++++++---------
>  1 file changed, 6 insertions(+), 9 deletions(-)

Reviewed-by: Jiri Denemark <jdenemar at redhat.com>


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