Re: [Qemu-devel] [PULL v1 25/32] qdev: add DEFINE_PROP_TPMBE

[Cornelia Huck <cohuck@redhat.com>]

On Mon, 18 Dec 2017 16:10:50 +0100
Laurent Vivier <lvivier@redhat.com> wrote:

> On 16/12/2017 18:41, Stefan Berger wrote:
> > From: Marc-André Lureau <marcandre.lureau@redhat.com>
> > 
> > A property to lookup a tpm backend.
> > 
> > Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> > Reviewed-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
> > Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
> > ---
> >  hw/core/qdev-properties-system.c | 64 ++++++++++++++++++++++++++++++++++++++++
> >  include/hw/qdev-properties.h     |  3 ++
> >  2 files changed, 67 insertions(+)  
> 
> This one breaks my build:
> 
> ...
>   LINK    ppc64-softmmu/qemu-system-ppc64
> ../hw/core/qdev-properties-system.o: In function `release_tpm':
> /home/lvivier/qemu/hw/core/qdev-properties-system.c:291: undefined
> reference to `tpm_backend_reset'
> ../hw/core/qdev-properties-system.o: In function `set_tpm':
> /home/lvivier/qemu/hw/core/qdev-properties-system.c:274: undefined
> reference to `qemu_find_tpm_be'
> /home/lvivier/qemu/hw/core/qdev-properties-system.c:278: undefined
> reference to `tpm_backend_init'
> collect2: error: ld returned 1 exit status
> 
> The following #ifdef fixes the problem for me:
> 
> diff --git a/hw/core/qdev-properties-system.c
> b/hw/core/qdev-properties-system.c
> index c173646..b6eca3b 100644
> --- a/hw/core/qdev-properties-system.c
> +++ b/hw/core/qdev-properties-system.c
> @@ -239,6 +239,7 @@ const PropertyInfo qdev_prop_chr = {
> 
>  /* --- character device --- */
> 
> +#if defined(CONFIG_TPM)
>  static void get_tpm(Object *obj, Visitor *v, const char *name, void
> *opaque,
>                      Error **errp)
>  {
> @@ -299,6 +300,7 @@ const PropertyInfo qdev_prop_tpm = {
>      .set   = set_tpm,
>      .release = release_tpm,
>  };
> +#endif
> 
>  /* --- netdev device --- */
>  static void get_netdev(Object *obj, Visitor *v, const char *name,
> 
> Thanks,
> Laurent
> 

This seems to be a popular error today :)

https://lists.nongnu.org/archive/html/qemu-devel/2017-12/msg03511.html