[libvirt] [PATCH] build: fix build with newer gnutls

[Eric Blake]

On 05/28/2013 09:23 PM, Eric Blake wrote:
> Building with gnutls 3.2.0 (such as shipped with current cygwin) fails
> with:
> 
> rpc/virnettlscontext.c: In function 'virNetTLSSessionGetKeySize':
> rpc/virnettlscontext.c:1358:5: error: implicit declaration of function 'gnutls_cipher_get_key_size' [-Wimplicit-function-declaration]
> 
> Yeah, it's stupid that gnutls broke API by moving their declaration
> into a new header without including that header from the old one,
> but it's easy enough to work around, all without breaking on gnutls
> 1.4.1 (hello RHEL 5) that lacked the new header.
> 
> * src/rpc/virnettlscontext.c (includes): Include additional header.
> * configure.ac (gnutls): Check for <gnutls/crypto.h>.
> 
> Signed-off-by: Eric Blake <eblake at redhat.com>
> ---
> 
> Pushing under the build-breaker rule, once my testing completes
> across multiple systems with various gnutls versions (1.4.1 in
> RHEL5, 2.12.23 in Fedora 18, 3.2.0 in Cygwin).

Or not - it failed my builds.

> +++ b/configure.ac
> @@ -1087,6 +1087,7 @@ if test "x$with_gnutls" != "xno"; then
>    if test "$GNUTLS_FOUND" = "no"; then
>      fail=0
>      AC_CHECK_HEADER([gnutls/gnutls.h], [], [fail=1])
> +    AC_CHECK_HEADERS([gnutls/crypto.h])

This line needs tweaking to pre-include <gnutls/gnutls.h> before probing
for crypto.h.  I'll post a v2 once I complete more testing.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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