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From: Hui Liu <onlyflyer@gmail.com>
To: users@dpdk.org
Subject: [dpdk-users] DPDK library link issue with __attribute__((constructor))
Date: Sun, 4 Mar 2018 21:08:45 -0800	[thread overview]
Message-ID: <CAF=f7313pVcOsy8+g297OpAnMbxgBkutYtxqoy_YVSz1t987oA@mail.gmail.com> (raw)

Hi Guys,

I am using DPDK with the yocto build system.

I found some static library is not linked because of the linker's as-needed
decision.

Some .a file use __attribute__((constructor)) to register their APIs,
we only know if we use these APIs at runtime, but linker make the decision
early and then discarded them.

I tried a lot to link the library I need:

1, use -Wl, --no-as-needed, for example:
gcc a.c *-Wl, --no-as-needed* -ldl -ldpdk

2, Put the library explicitly to the linker like this:
gcc a.c -Wl, --no-as-needed -ldl -ldpdk *-lrte_mempool*

At last, I still didn't find my library in the elf file.

Is there anything else I can try to link these library?

-- 
Thanks & Best Regards
Liu Hui
--

             reply	other threads:[~2018-03-05  5:08 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-05  5:08 Hui Liu [this message]
2018-03-05  9:15 ` Hui Liu
2018-03-05 13:28   ` Wiles, Keith
2018-03-07  1:02     ` Hui Liu

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