[libvirt] [PATCH] Fix compilation with gcrypt < 1.4.2

[Daniel Veillard]

On Fri, Dec 18, 2009 at 12:10:08PM +0100, Matthias Bolte wrote:
> Commit 33a198c1f6a4a1bc7f34d50a31032e03bec10fee increased the gcrypt
> version requirement to 1.4.2 because the GCRY_THREAD_OPTION_VERSION
> define was added in this version.
> 
> The configure script doesn't check for the gcrypt version. To support
> gcrypt versions < 1.4.2 change the virTLSThreadImpl initialization
> to use GCRY_THREAD_OPTION_VERSION only if it's defined.
> ---
>  src/libvirt.c |    5 +++++
>  1 files changed, 5 insertions(+), 0 deletions(-)
> 
> diff --git a/src/libvirt.c b/src/libvirt.c
> index cad33c2..937cdb4 100644
> --- a/src/libvirt.c
> +++ b/src/libvirt.c
> @@ -291,7 +291,12 @@ static int virTLSMutexUnlock(void **priv)
>  }
>  
>  static struct gcry_thread_cbs virTLSThreadImpl = {
> +    /* GCRY_THREAD_OPTION_VERSION was added in gcrypt 1.4.2 */
> +#ifdef GCRY_THREAD_OPTION_VERSION
>      (GCRY_THREAD_OPTION_PTHREAD | (GCRY_THREAD_OPTION_VERSION << 8)),
> +#else
> +    GCRY_THREAD_OPTION_PTHREAD,
> +#endif
>      NULL,
>      virTLSMutexInit,
>      virTLSMutexDestroy,

  I think that's the simplest. gcrypt 1.4.2 is rather old, but still
it might be preferable to not break build and keep without the fix if
on the old one.

 ACK,

Daniel

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