[dpdk-dev] [PATCH] net/virtio: fix build errors

[<jerinj@marvell.com>]

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;
-- 
2.22.0