[Question/Issue] pkgconfig does not include dpdk/drivers libs

[Abhineet Pandey <abhineet.pandey@nutanix.com>]

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I’m consuming dpdk via spdk.
I was trying to use pkg-config for a Makefile that I’m writing,

Executing:
PKG_CONFIG_PATH=dpdk/build/lib/pkgconfig pkg-config --libs --static libdpdk

Output:
-Wl,--whole-archive -Wl,--no-whole-archive -Wl,--as-needed -pthread -L/home/nutanix/exact_spdk/spdk/dpdk/build/lib -l:librte_bus_pci.a -l:librte_bus_vdev.a -l:librte_mempool_ring.a -l:librte_vhost.a -l:librte_security.a -l:librte_reorder.a -l:librte_power.a -l:librte_cryptodev.a -l:librte_compressdev.a -l:librte_timer.a -l:librte_hash.a -l:librte_cmdline.a -l:librte_pci.a -l:librte_ethdev.a -l:librte_meter.a -l:librte_net.a -l:librte_mbuf.a -l:librte_mempool.a -l:librte_rcu.a -l:librte_ring.a -l:librte_eal.a -l:librte_telemetry.a -l:librte_kvargs.a -lrte_vhost -lrte_security -lrte_reorder -lrte_power -lrte_cryptodev -lrte_compressdev -lrte_timer -lrte_hash -lrte_cmdline -lrte_pci -lrte_ethdev -lrte_meter -lrte_net -lrte_mbuf -lrte_mempool -lrte_rcu -lrte_ring -lrte_eal -lrte_telemetry -lrte_kvargs -lm -ldl -lnuma

At a closer look, you’ll see -l:librte_bus_pci.a -l:librte_bus_vdev.a -l:librte_mempool_ring.a, but you won’t find corresponding -lrte_bus_pci, -lrte_bus_vdev, -lrte_mempool_ring. This showed up in my use case as rte_mempool_ring has some functions which execute on startup via __attribute__((constructor)), and they did not execute thus causing issues.

I think the issue is that in pkgconfig we reference ‘dpdk_libraries’, which is updated libs/meson.build, but not updated in drivers/meson.build.

If I apply this fix:

--- a/drivers/meson.build
+++ b/drivers/meson.build
@@ -277,7 +277,7 @@ foreach subpath:subdirs
         static_dep = declare_dependency(
                 include_directories: includes,
                 dependencies: static_deps)
-
+        dpdk_libraries = [shared_lib] + dpdk_libraries
          dpdk_drivers += static_lib

Then things work well and I see -lrte_bus_pci, -lrte_bus_vdev, -lrte_mempool_ring in output of:
PKG_CONFIG_PATH=dpdk/build/lib/pkgconfig pkg-config --libs --static libdpdk

Please let me know if the current behavior is expected, or this change is needed.

Regards
Abhineet Pandey

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