[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Mon, 4 Apr 2022 14:45:43 -0700
From: Andrii Nakryiko <andrii.nakryiko@...il.com>
To: Alexander Lobakin <alexandr.lobakin@...el.com>
Cc: Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Andrii Nakryiko <andrii@...nel.org>,
Martin KaFai Lau <kafai@...com>,
Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
John Fastabend <john.fastabend@...il.com>,
KP Singh <kpsingh@...nel.org>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Jesper Dangaard Brouer <hawk@...nel.org>,
Lorenzo Bianconi <lorenzo@...nel.org>,
Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH bpf-next] samples: bpf: fix linking xdp_router_ipv4 after migration
On Mon, Apr 4, 2022 at 4:57 AM Alexander Lobakin
<alexandr.lobakin@...el.com> wrote:
>
> Users of the xdp_sample_user infra should be explicitly linked
> with the standard math library (`-lm`). Otherwise, the following
> happens:
>
> /usr/bin/ld: xdp_sample_user.c:(.text+0x59fc): undefined reference to `ceil'
> /usr/bin/ld: xdp_sample_user.c:(.text+0x5a0d): undefined reference to `ceil'
> /usr/bin/ld: xdp_sample_user.c:(.text+0x5adc): undefined reference to `floor'
> /usr/bin/ld: xdp_sample_user.c:(.text+0x5b01): undefined reference to `ceil'
> /usr/bin/ld: xdp_sample_user.c:(.text+0x5c1e): undefined reference to `floor'
> /usr/bin/ld: xdp_sample_user.c:(.text+0x5c43): undefined reference to `ceil
> [...]
I actually don't get these, but applied to bpf-next anyway.
>
> That happened previously, so there's a block of linkage flags in the
> Makefile. xdp_router_ipv4 has been transferred to this infra quite
> recently, but hasn't been added to it. Fix.
>
> Fixes: 85bf1f51691c ("samples: bpf: Convert xdp_router_ipv4 to XDP samples helper")
> Signed-off-by: Alexander Lobakin <alexandr.lobakin@...el.com>
> ---
> samples/bpf/Makefile | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
> index b4fa0e69aa14..342a41a10356 100644
> --- a/samples/bpf/Makefile
> +++ b/samples/bpf/Makefile
> @@ -219,6 +219,7 @@ TPROGLDLIBS_xdp_redirect += -lm
> TPROGLDLIBS_xdp_redirect_cpu += -lm
> TPROGLDLIBS_xdp_redirect_map += -lm
> TPROGLDLIBS_xdp_redirect_map_multi += -lm
> +TPROGLDLIBS_xdp_router_ipv4 += -lm
> TPROGLDLIBS_tracex4 += -lrt
> TPROGLDLIBS_trace_output += -lrt
> TPROGLDLIBS_map_perf_test += -lrt
> --
> 2.35.1
>
Powered by blists - more mailing lists