From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <stephen@networkplumber.org>
Subject: Re: librte_table build race with SYMLINK-FILE?
Date: Mon, 11 Apr 2016 11:15:31 -0700
Message-ID: <20160411111531.5044d1d9@xeon-e3>
References: <570B8078.7060409@netinsight.net>
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Cc: dev@dpdk.org, bruce.richardson@intel.com,
 jerin.jacob@caviumnetworks.com, jianbo.liu@linaro.org
To: Simon =?UTF-8?B?S8OlZ3N0csO2bQ==?= <simon.kagstrom@netinsight.net>
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On Mon, 11 Apr 2016 12:46:16 +0200
Simon K=C3=A5gstr=C3=B6m <simon.kagstrom@netinsight.net> wrote:

> Hi!
>=20
> I'm upgrading from DPDK 2.1 to 16.04-rc4, and have a new build issue
> which I didn't see before. It's in the librte_table and happens from
> time to time (unfrequently) in my out-of-tree build. It looks like a
> race between comilation and SYMLINK-FILE:
>=20
> [...]
> =3D=3D Build lib/librte_table
>   CC rte_table_lpm_ipv6.o
>   CC rte_table_lpm.o
>   CC rte_table_acl.o
>   CC rte_table_hash_key8.o
> In file included from [...]lib/librte_table/rte_table_lpm.c:43:0:
> [...]/dpdk.build/include/rte_lpm.h:484:25: fatal error: rte_lpm_sse.h:
> No such file or directory
>  #include "rte_lpm_sse.h"
>                          ^
> compilation terminated.
>   CC rte_table_hash_key16.o
> [...]
>=20
> In this case, rte_lpm_sse.h is optionally symlinked if we're not on ARM.
> I've tried patching away the issue by unconditionally symlinking the
> _{neon,sse}.h files, and while I don't see the problem after that, I
> don't really see why it would improve the situation.
>=20
> Does anyone else see this as well?
>=20
> // Simon

The issue is a missing dependency in the mk file for LPM.