[dpdk-dev] meson: wrong dependency in cross compilation on ARM

[Hemant Agrawal]

Hi,
                I am trying to cross compile DPDK for arm64 on a ubuntu machine, which has a zlib pre-installed for native env.

I am encountering following build error in net_bnx2x as it has dependency on zlib.  It is trying to link with x86 arch based zlib.

Cross compiling zlib and setting the PKG_CONFIG_PATH solve the issue. But, Is their an easy way to disable these dependencies?



b10814 at dpdk-xeon:~/dpdk-up$ meson arm-build --cross-file config/arm/arm64_armv8_linux_gcc
Configuration found that :
Run-time dependency zlib found: YES 1.2.11
(NOTE: it seems meson is detecting the default x86 based zlib for linking)

Note that this machine has ARM tool chain installed by Ubuntu
sudo apt-get install gcc-aarch64-linux-gnu

b10814 at dpdk-xeon:~/dpdk-up$ ninja -C arm-build
ninja: Entering directory `arm-build'
[1289/2375] Linking target drivers/librte_net_bnx2x.so.21.1
FAILED: drivers/librte_net_bnx2x.so.21.1
aarch64-linux-gnu-gcc  -o drivers/librte_net_bnx2x.so.21.1 drivers/librte_net_bnx2x.so.21.1.p/meson-generated_.._rte_net_bnx2x.pmd.c.o drivers/libtmp_rte_net_bnx2x.a.p/net_bnx2x_bnx2x.c.o drivers/libtmp_rte_net_bnx2x.a.p/net_bnx2x_bnx2x_ethdev.c.o drivers/libtmp_rte_net_bnx2x.a.p/net_bnx2x_bnx2x_rxtx.c.o drivers/libtmp_rte_net_bnx2x.a.p/net_bnx2x_bnx2x_stats.c.o drivers/libtmp_rte_net_bnx2x.a.p/net_bnx2x_bnx2x_vfpf.c.o drivers/libtmp_rte_net_bnx2x.a.p/net_bnx2x_ecore_sp.c.o drivers/libtmp_rte_net_bnx2x.a.p/net_bnx2x_elink.c.o -Wl,--as-needed -Wl,--no-undefined -Wl,-O1 -shared -fPIC -Wl,--start-group -Wl,-soname,librte_net_bnx2x.so.21 -Wl,--no-as-needed -pthread -lm -ldl lib/librte_ethdev.so.21.1 lib/librte_eal.so.21.1 lib/librte_kvargs.so.21.1 lib/librte_telemetry.so.21.1 lib/librte_net.so.21.1 lib/librte_mbuf.so.21.1 lib/librte_mempool.so.21.1 lib/librte_ring.so.21.1 lib/librte_meter.so.21.1 drivers/librte_bus_pci.so.21.1 lib/librte_pci.so.21.1 drivers/librte_bus_vdev.so.21.1 -Wl,--version-script=/home/b10814/dpdk-up/drivers/net/bnx2x/version.map /usr/lib/x86_64-linux-gnu/libz.so -Wl,--end-group '-Wl,-rpath,$ORIGIN/../lib:$ORIGIN/' -Wl,-rpath-link,/home/b10814/dpdk-up/arm-build/lib -Wl,-rpath-link,/home/b10814/dpdk-up/arm-build/drivers
/usr/lib/x86_64-linux-gnu/libz.so: error adding symbols: File in wrong format
collect2: error: ld returned 1 exit status
[1314/2375] Compiling C object drivers/net/ice/base/libice_base.a.p/ice_switch.c.o
ninja: build stopped: subcommand failed.


Regards,
Hemant