From: Bruce Richardson <bruce.richardson@intel.com>
To: Neil Horman <nhorman@tuxdriver.com>
Cc: dev@dpdk.org, Hemant Agrawal <hemant.agrawal@nxp.com>,
Jerin Jacob <Jerin.Jacob@cavium.com>,
Thomas Monjalon <thomas.monjalon@6wind.com>
Subject: Re: [dpdk-dev] [PATCH] pmdinfogen: Fix pmdinfogen to select proper endianess on cross-compile
Date: Mon, 21 Nov 2016 10:11:33 +0000 [thread overview]
Message-ID: <20161121101133.GC16124@bricha3-MOBL3.ger.corp.intel.com> (raw)
In-Reply-To: <1479494872-9302-1-git-send-email-nhorman@tuxdriver.com>
On Fri, Nov 18, 2016 at 01:47:52PM -0500, Neil Horman wrote:
> pmdinfogen has a bug in which, during build, it pulls in rte_byteorder.h to
> obtain the rte macros for byteswapping between the cpu byte order and big or
> little endian. Unfortunately, pmdinfogen is a tool that is only meant to be run
> during the build of dpdk components, and so, it runs on the host. In cross
> compile environments however, the rte_byteorder.h is configured using a target
> cpu, who's endianess may differ from that of the host, leading to improper
> swapping.
>
> The fix is to use host system defined byte swapping routines rather than the
> dpdk provided routines. Note that we are using non posix compliant routines, as
> the posix compliant api only addresses 16 and 32 bit swaps, and we also need 64
> bit swaps. Those macros exist (via endian.h), but BSD and Linux put that header
> in different locations so some ifdeffery is required.
>
> Tested successfully by myself on Linux and BSD systems.
>
> Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
> CC: Hemant Agrawal <hemant.agrawal@nxp.com>
> CC: Jerin Jacob <Jerin.Jacob@cavium.com>
> CC: Bruce Richardson <bruce.richardson@intel.com>
> CC: Thomas Monjalon <thomas.monjalon@6wind.com>
> ---
> buildtools/pmdinfogen/pmdinfogen.h | 10 +++++++---
> 1 file changed, 7 insertions(+), 3 deletions(-)
Compiles fine on FreeBSD with clang.
Tested-by: Bruce Richardson <bruce.richardson@intel.com>
next prev parent reply other threads:[~2016-11-21 10:11 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-18 18:47 Neil Horman
2016-11-21 10:11 ` Bruce Richardson [this message]
2016-12-01 15:17 ` Thomas Monjalon
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