[dpdk-dev] Linker error on rte_dump_stack() on Windows

[Dmitry Kozlyuk]

2021-08-08 10:45 (UTC-0700), William Tu:
> Hi,
> 
> While linking OVS to Windows DPDK library, static link to
> librte_eal.a, we hit some error about rte_dump_stack().
> I don't know why other symbols work, but only a couple symbols showed
> errors here.
> Any suggestions about how to debug/fix this? Thank you!
> 
> [5/15] Linking target utilities/ovs-vsctl.exeFAILED:
> utilities/ovs-vsctl.exe"clang"  -Wl,/MACHINE:X64
> -Wl,/OUT:utilities/ovs-vsctl.exe
> utilities/ovs-vsctl.exe.p/ovs-vsctl.c.obj "-Wl,/nologo" "-Wl,/release"
> "-Wl,/nologo" "-Wl,/OPT:REF" "lib\libopenvswitch.a"
> "-Wl,--no-undefined" "C:/dpdk/install/lib/librte_eal.a"
> "C:/dpdk/install/lib/librte_ethdev.a"
> "C:/dpdk/install/lib/librte_mempool.a"
> "C:/dpdk/install/lib/librte_mbuf.a"
> "C:/dpdk/install/lib/librte_meter.a""C:/dpdk/install/lib/librte_telemetry.a"
> "C:/dpdk/install/lib/librte_kvargs.a"
> "C:/PTHREADS-BUILT/lib/libpthreadVC3.lib" "-lWs2_32" "-lWbemUuid"
> "-lShlwapi" "-lIphlpapi" "-Wl,/SUBSYSTEM:CONSOLE" "-lkernel32"
> "-luser32" "-lgdi32" "-lwinspool" "-lshell32" "-lole32" "-loleaut32"
> "-luuid" "-lcomdlg32" "-ladvapi32"
> LINK : warning LNK4044: unrecognized option '/-no-undefined'; ignored
> librte_eal.a(eal_windows_eal_debug.c.obj) : error LNK2019: unresolved
> external symbol __imp_SymInitialize referenced in function
> rte_dump_stack

Hi William,

`rte_dump_stack()` implementation requires linking DbgHelp system library.
There are other required libraries, see `add_project_link_arguments()` in
`config/meson.build`.

I also noticed that these libraries are not added to pkg-config
`Libs.private`. We must use `ext_deps` and `cc.find_library()`
instead of `add_project_link_arguments('-l...')`. IIRC you don't use
pkg-config, but still.