On 9/28/2023 10:32 AM, Bruce Richardson wrote:
> On Thu, Sep 28, 2023 at 09:25:53AM +0000, Shibin Koikkara Reeny wrote:
>> Shared UMEM feature is missing in the af_xdp driver build
>> after the commit 33d66940e9ba ("build: use C11 standard").
>>
>> Runtime Error log while using Shared UMEM feature:
>> rte_pmd_af_xdp_probe(): Initializing pmd_af_xdp for net_af_xdp0
>> init_internals(): Shared UMEM feature not available. Check kernel
>> and libbpf version
>> rte_pmd_af_xdp_probe(): Failed to init internals
>> vdev_probe(): failed to initialize net_af_xdp0 device
>> EAL: Bus (vdev) probe failed.
>>
>> Reason for the missing UMEM feature is because the C11 standard
>> doesn't include the GNU compiler extensions typeof and asm, used
>> by the libbpf and libxdp header files.
>>
>> Meson error log:
>> In file included from
>> dpdk/build/meson-private/tmpf74nkhqd/testfile.c:5:
>> /usr/local/include/bpf/xsk.h: In function 'xsk_prod_nb_free':
>> /usr/local/include/bpf/xsk.h:165:26: error: expected ';' before '___p1'
>> 165 | r->cached_cons = libbpf_smp_load_acquire(r->consumer);
>> | ^~~~~~~~~~~~~~~~~~~~~~~
>> /usr/local/include/bpf/xsk.h:165:26: error: 'asm' undeclared (first use
>> in this function)
>> ...
>> /usr/local/include/bpf/xsk.h:199:9: error: unknown type name 'typeof'
>> 199 | libbpf_smp_store_release(prod->producer, *prod->producer
>> + nb);
>> | ^~~~~~~~~~~~~~~~~~~~~~~~
>>
>> Fix is to provide alternative keywords by using Option Controlling C
>> Dialect [1].
>>
>
> Minor nit, this patch provides the alternative keywords using macros rather
> than any
> C dialect options.
>
Fixed while merging.
>> Fixes: 33d66940e9ba ("build: use C11 standard")
>>
>> [1] https://gcc.gnu.org/onlinedocs/gcc/C-Dialect-Options.html
>>
>> v3: Used alternative keywords fix.
>> v2: Added original commit causing the issue.
>> Signed-off-by: Shibin Koikkara Reeny <shibin.koikkara.re...@intel.com>
>> ---
>
> Acked-by: Bruce Richardson <bruce.richard...@intel.com>
>
Applied to dpdk-next-net/main, thanks.
