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Re: dead code remover under gcc -O and higher(Is there a flag to do this)

From: "chengjian (D)" <cj dot chengjian at huawei dot com>
To: carl hansen <carlhansen1234 at gmail dot com>
Cc: GCC Development <gcc at gcc dot gnu dot org>, Li Bin <huawei dot libin at huawei dot com>, "Xiexiuqi (Xie XiuQi)" <xiexiuqi at huawei dot com>
Date: Mon, 4 Dec 2017 10:51:12 +0800
Subject: Re: dead code remover under gcc -O and higher(Is there a flag to do this)
Authentication-results: sourceware.org; auth=none
References: <abf9d156-a3db-58b8-26d2-d4c4159b1481@huawei.com> <CAHEkXCSKDAG4ktaUt81Murno8nTJ8gCUbevZBWOQddeZV2JzYQ@mail.gmail.com>



On 2017/12/4 10:25, carl hansen wrote:

line 12 , you say "void A( );"

say instead:
void A(){};

That solved it for me, using gcc7.2


Yeah, I miss the implementation, but I did this on purpose

I'm curious is there any options to eliminate this.
like gcc -O2 do.

thanks.

References:
- dead code remover under gcc -O and higher(Is there a flag to do this)
  - From: chengjian (D)
- Re: dead code remover under gcc -O and higher(Is there a flag to do this)
  - From: carl hansen

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