Re: [PATCH v4 6/6] net/af_xdp: make compatible with libbpf v0.8.0

[Ferruh Yigit <ferruh.yigit@amd.com>]

On 10/6/2022 7:26 AM, Andrew Rybchenko wrote:
> From: Ciara Loftus <ciara.loftus@intel.com>
> 
> libbpf v0.8.0 deprecates the bpf_get_link_xdp_id() and
> bpf_set_link_xdp_fd() functions. Use meson to detect if
> bpf_xdp_attach() is available and if so, use the recommended
> replacement functions bpf_xdp_query_id(), bpf_xdp_attach()
> and bpf_xdp_detach().
> 
> Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
> Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>

<...>

> diff --git a/drivers/net/af_xdp/meson.build b/drivers/net/af_xdp/meson.build
> index 9d5ffab96b..858047989e 100644
> --- a/drivers/net/af_xdp/meson.build
> +++ b/drivers/net/af_xdp/meson.build
> @@ -64,4 +64,9 @@ if build
>                        dependencies : bpf_dep)
>         cflags += ['-DRTE_NET_AF_XDP_LIBBPF_OBJ_OPEN']
>     endif
> +  if cc.has_function('bpf_xdp_attach',
> +                     prefix : '#include <bpf/libbpf.h>',
> +                     dependencies : bpf_dep)
> +      cflags += ['-DRTE_NET_AF_XDP_LIBBPF_XDP_ATTACH']
> +  endif

meson is not detecting functions, I am getting following log, any idea 
what is going wrong:

Run-time dependency libxdp found: YES 1.2.2
Run-time dependency libbpf found: YES 0.8.1
Has header "linux/if_xdp.h" : YES
Has header "xdp/xsk.h" : YES
Has header "bpf/bpf.h" : YES
Checking for function "xsk_socket__create_shared" with dependencies 
libxdp, libbpf: NO
Checking for function "bpf_object__next_program" with dependency libbpf: NO
Checking for function "bpf_xdp_attach" with dependency libbpf: NO