[dpdk-dev] [dpdk v1] net/mlx5: fix possible building error

[Tonghao Zhang]

On Mon, Mar 2, 2020 at 1:09 AM Ali Alnubani <alialnu at mellanox.com> wrote:
>
> Hi Tonghao,
>
> > -----Original Message-----
> > From: dev <dev-bounces at dpdk.org> On Behalf Of
> > xiangxia.m.yue at gmail.com
> > Sent: Saturday, February 29, 2020 12:27 PM
> > To: Matan Azrad <matan at mellanox.com>; dev at dpdk.org
> > Cc: Tonghao Zhang <xiangxia.m.yue at gmail.com>; stable at dpdk.org
> > Subject: [dpdk-dev] [dpdk v1] net/mlx5: fix possible building error
> >
> > From: Tonghao Zhang <xiangxia.m.yue at gmail.com>
> >
> > When setting the CONFIG_RTE_BUILD_SHARED_LIB to y, and build the mlx5
> > pmd, there is a building error.
> > To fix it, add RTE_IBVERBS_LINK_DLOPEN to include relative codes.
> >
> > > mlx5_common.o: In function `mlx5_glue_init':
> > > drivers/common/mlx5/mlx5_common.c:324: undefined reference to
> > `dlclose'
> >
> > Fixes: 7b4f1e6bd367 ("common/mlx5: introduce common library")
> > Cc: stable at dpdk.org
> >
> > Signed-off-by: Tonghao Zhang <xiangxia.m.yue at gmail.com>
> > ---
> >  drivers/common/mlx5/mlx5_common.c | 5 +++--
> >  1 file changed, 3 insertions(+), 2 deletions(-)
> >
>
> I test this case on multiple environments and don't see the build failure. Can you please provide more information about yours, and how to reproduce this?
Hi Ali,
I use the dpdk-next-net, and the last commit id is
d7142fbae16f185e11bfa44be061399afc40a1be.
The build config is show as below:

diff --git a/config/common_base b/config/common_base
index 7ca2f28..4bd5126 100644
--- a/config/common_base
+++ b/config/common_base
@@ -57,7 +57,7 @@ CONFIG_RTE_ENABLE_LTO=n
 #
 # Compile to share library
 #
-CONFIG_RTE_BUILD_SHARED_LIB=n
+CONFIG_RTE_BUILD_SHARED_LIB=y

 #
 # Use newest code breaking previous ABI
@@ -363,7 +363,7 @@ CONFIG_RTE_LIBRTE_MLX4_DEBUG=n
 # Compile burst-oriented Mellanox ConnectX-4, ConnectX-5,
 # ConnectX-6 & BlueField (MLX5) PMD
 #
-CONFIG_RTE_LIBRTE_MLX5_PMD=n
+CONFIG_RTE_LIBRTE_MLX5_PMD=y
 CONFIG_RTE_LIBRTE_MLX5_DEBUG=n

 #

The building failure log show:
LD librte_common_mlx5.so.20.0.1
mlx5_common.o: In function `mlx5_glue_init':
/root/zth/myshell/dpdk-next-net/drivers/common/mlx5/mlx5_common.c:324:
undefined reference to `dlclose'
collect2: error: ld returned 1 exit status

> Thanks,
> Ali