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To: jerinj@marvell.com, dev@dpdk.org, Tiwei Bie <tiwei.bie@intel.com>,
Zhihong Wang <zhihong.wang@intel.com>
Cc: thomas@monjalon.net, Jianfeng Tan <jianfeng.tan@intel.com>, stable@dpdk.org
References: <20190730110406.30007-1-jerinj@marvell.com>
From: Maxime Coquelin <maxime.coquelin@redhat.com>
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Date: Tue, 30 Jul 2019 18:12:58 +0200
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(mx1.redhat.com [10.5.110.49]); Tue, 30 Jul 2019 16:13:02 +0000 (UTC)
Subject: Re: [dpdk-dev] [PATCH] net/virtio: fix build errors
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On 7/30/19 1:04 PM, jerinj@marvell.com wrote:
> From: Jerin Jacob <jerinj@marvell.com>
>
> Add extern to variable declaration to avoid some compiler treating it
> as variable definition.
>
> build error log:
>
> lib/librte_pmd_virtio.a(vhost_kernel.o):(.rodata+0x110):
> multiple definition of `vhost_msg_strings'
> lib/librte_pmd_virtio.a(vhost_user.o):(.data.rel.ro.local+0x0):
> first defined here
> lib/librte_pmd_virtio.a(virtio_user_dev.o):(.rodata+0xe8):
> multiple definition of `vhost_msg_strings'
> lib/librte_pmd_virtio.a(vhost_user.o):(.data.rel.ro.local+0x0):
> first defined here
>
> Fixes: 33d24d65fe2b ("net/virtio-user: abstract backend operations")
>
> Cc: Jianfeng Tan <jianfeng.tan@intel.com>
> Cc: stable@dpdk.org
>
> Signed-off-by: Jerin Jacob <jerinj@marvell.com>
> ---
> drivers/net/virtio/virtio_user/vhost.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/virtio/virtio_user/vhost.h b/drivers/net/virtio/virtio_user/vhost.h
> index 55f47036b..1e784e58e 100644
> --- a/drivers/net/virtio/virtio_user/vhost.h
> +++ b/drivers/net/virtio/virtio_user/vhost.h
> @@ -67,7 +67,7 @@ enum vhost_user_request {
> VHOST_USER_MAX
> };
>
> -const char * const vhost_msg_strings[VHOST_USER_MAX];
> +extern const char * const vhost_msg_strings[VHOST_USER_MAX];
>
> struct vhost_memory_region {
> uint64_t guest_phys_addr;
>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Thanks,
Maxime