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

From: Zamir SUN
Date: Wed Feb 07 2018 - 09:01:58 EST




On 02/07/2018 07:18 AM, Steven Rostedt wrote:
> On Sun, 4 Feb 2018 11:20:13 +0800
> sztsian@xxxxxxxxx wrote:
>
>> From: Zamir SUN <sztsian@xxxxxxxxx>
>>
>> The current detection for swig will cause output to be
>> /usr/bin/swig
>> y
>> So this will never be equal to y. With this patch, the swig path is
>> removed from output, so the detection can work as expected.
>>
>> Fixes 3bf187a43b7e6302592552ecbc294e5820249687
>
> Hi Zamir,
>
> Actually, a fix was already sent to me:
>
> http://lkml.kernel.org/r/20171220180748.17273-18-vladislav.valtchev@xxxxxxxxx
>
> I'm working on add that one.
>

Thanks for the heads-up! I did not see that before.

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.


> Thanks!
>
> -- Steve
>
>
>>
>> Signed-off-by: Zamir SUN (Red Hat) <sztsian@xxxxxxxxx>
>> ---
>> Makefile | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/Makefile b/Makefile
>> index a5d2c38..7c0d1a6 100644
>> --- a/Makefile
>> +++ b/Makefile
>> @@ -105,7 +105,7 @@ PYTHON_GUI := ctracecmd.so ctracecmdgui.so
>> PYTHON_VERS ?= python
>>
>> # Can build python?
>> -ifeq ($(shell sh -c "pkg-config --cflags $(PYTHON_VERS) > /dev/null 2>&1 && which swig && echo y"), y)
>> +ifeq ($(shell sh -c "pkg-config --cflags $(PYTHON_VERS) > /dev/null 2>&1 && which swig > /dev/null && echo y"), y)
>> PYTHON_PLUGINS := plugin_python.so
>> BUILD_PYTHON := $(PYTHON) $(PYTHON_PLUGINS)
>> PYTHON_SO_INSTALL := ctracecmd.install
>

--
Zamir SUN
Fedora user
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