[Bug 192] construct function miss for build with static library

[Bug 192] construct function miss for build with static library

[bugzilla]

https://bugs.dpdk.org/show_bug.cgi?id=192

            Bug ID: 192
           Summary: construct function miss for  build with static library
           Product: DPDK
           Version: 18.11
          Hardware: All
                OS: All
            Status: CONFIRMED
          Severity: normal
          Priority: Normal
         Component: mk
          Assignee: dev@dpdk.org
          Reporter: qingfu.cqf@alibaba-inc.com
  Target Milestone: ---

I use libdpdk.a to compile a libpmd.so, but I find some construction function
missed in libpmd.so
There're two file have such issue:
1. drivers/mempool/ring/rte_mempool_ring.c
No function in this file will be call from other place, so if I don't  add -Wl,
--whole-archive libdpdk.a  for gcc , then the construction function will not be
generated to libpmd.so
the construction functions are:
MEMPOOL_REGISTER_OPS(ops_mp_mc)
MEMPOOL_REGISTER_OPS(ops_sp_sc)
MEMPOOL_REGISTER_OPS(ops_mp_sc)
MEMPOOL_REGISTER_OPS(ops_sp_mc)

2.  drivers/mempool/stack/rte_mempool_stack.c


Current we can add  -Wl, --whole-archive to workaround, or add a null function
in this 2 file, but it looks very stupid.

Thank you

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