[ovs-dev] OVS compiling issue(gcc version 6.5.0 )

[Yanqin Wei (Arm Technology China)]

Hi Ben,

After reconfigure the compiler: CC=gcc , this issue is solved.  I tried to reproduce it and found reproducing condition is to switch default gcc version after running configure script.
1. default gcc is gcc-8, running the configure script.
2. change the default gcc to gcc-6
3. building  <--- compiling error

4. specific C compiler by configure script: compiler CC=gcc  <--  building success
5. change default gcc to gcc-8 and running the configure script
6  change default gcc to gcc-6 & building <-- compiling error

In the config.log after step 3, the detected gcc version is 8.2, so it choose some unsupported compiler option for gcc-6.
configure:4038: checking for C compiler version
configure:4047: gcc --version >&5
gcc (GCC) 8.2.0
Copyright (C) 2018 Free Software Foundation, Inc.

So I think it should not be a bug.  It is a configure issue. Thanks for your support.

Best Regards,
Wei Yanqin

-----Original Message-----
From: Ben Pfaff <blp at ovn.org>
Sent: Tuesday, June 4, 2019 7:11 AM
To: Yanqin Wei (Arm Technology China) <Yanqin.Wei at arm.com>
Cc: ovs-discuss at openvswitch.org; dev at openvswitch.org
Subject: Re: [ovs-dev] OVS compiling issue(gcc version 6.5.0 )

On Mon, Jun 03, 2019 at 11:18:23AM +0000, Yanqin Wei (Arm Technology China) wrote:
> I am trying to compile OVS(master branch) via gcc 6.5.0, but there is gcc option error.
> gcc: error: unrecognized command line option '-Wmultistatement-macros'; did you mean '-Wunused-macros'?

What's in config.log?

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