linux-kernel - Re: [PATCH 1/2] trace-cmd: Fix the detection for swig

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Message-ID: <a1c2c3f6-8d69-227d-51d4-1c40c53e0645@gmail.com>
Date:   Thu, 8 Feb 2018 20:05:13 +0800
From:   Zamir SUN <sztsian@...il.com>
To:     Vladislav Valtchev <vladislav.valtchev@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>
Cc:     johannes.berg@...el.com, johannes@...solutions.net,
        linux-kernel@...r.kernel.org, zsun@...hat.com
Subject: Re: [PATCH 1/2] trace-cmd: Fix the detection for swig



On 02/08/2018 01:25 AM, Vladislav Valtchev wrote:
> On Wed, 2018-02-07 at 22:01 +0800, Zamir SUN wrote:
>>
>> While just a note for this, in Fedora 27:
>>
>> $ if command -v swig; then echo 1; else echo 0; fi
>> /usr/bin/swig
>> 1
>>
>> Actually this test has the same problem as of `which swig` - When swig
>> exists, the var SWIG_DEFINED will not be 1 (as shown above).
>>
>> I see Vladislav is already on this thread. I hope this can be fixed
>> before merging the patch set.
>>
> 
> Hi Zamir,
> I'm sorry but I'm unable to reproduce the issue on Fedora 27,
> after applying my series of patches.
> 
> In my case (fresh install of Fedora27, no customizations):
> 	if command -v swig; then echo 1; else echo 0; fi
> works as expected.
> 
> SWIG_DEFINED does not have to be '1' in order the Makefile to work.
> Because the check in my branch is:
> 
> ifeq ($(SWIG_DEFINED), 0)
> BUILD_PYTHON := report_noswig
> NO_PYTHON = 1
> endif
> 
> So there should be no problem. Just to be sure, I've tried to compile trace-cmd
> with my patches first without 'swig' and later with it (on Fedora).
> The result was that, in the first case the message 'no swig installed'
> was displayed, while in the other case it was not. Or better, a message
> saying that 'python-dev' is missing was shown.
> [Yes, both swig and python-dev are necessary].
> 
> After installing also 'python-devel' (in Ubuntu is just '-dev'), the
> build system was able to build the rest of the python targets as well.
> 
> 
> Could you please try by using my fork on GitHub?
> https://github.com/vvaltchev/trace-cmd-fork
> BRANCH NAME: make8.
> 
> Let me know if you still experience the issue.
> 

Hi Vladislav,

Thanks for the URL. I tried to build from your make8 branch, it works
fine. I must made some copy-paste mistake yesterday.

Sorry for the noise.

Thanks.

> Thanks,
> Vlad
> 
> 
> 

-- 
Zamir SUN
Fedora user
GPG : 1D86 6D4A 49CE 4BBD 72CF FCF5 D856 6E11 F2A0 525E