Re: [Discuss-gnuradio] undefined symbol error

[Tom Rondeau]

On Thu, Jun 20, 2013 at 9:53 AM, Nemanja Savic <address@hidden> wrote:
> i am pretty sure when I delete inline it passes, otherwise not. Prototypes
> are the same for sure. The prototypes in .i file are the same even for
> inline and non-inline functions, i also checked that.

Actually, thinking about it, no, you can't use inline here. And
there's no place in our code where we inline functions that are
exported as a block's function through swig. It doesn't really make
sense to export an inlined function through a library. Wouldn't do any
good for the other side calling it. If they aren't changing any state
of your object, you can declare them const and then trust the compiler
to help you out here.

You can use inline functions in your implementation, or something
that's private/protected and not exported as part of the library. Not
every functions needs to or should be exported.

Tom


> On Thu, Jun 20, 2013 at 3:40 PM, Tom Rondeau <address@hidden> wrote:
>>
>> On Thu, Jun 20, 2013 at 9:38 AM, Nemanja Savic <address@hidden> wrote:
>> > Hi,
>> >
>> > I am using 3.6 style.
>> > And the problem is due to inline functions. Why? In some other blocks I
>> > have
>> > inline functions?
>>
>> No, there are no problems with inline functions. Are you sure the
>> function prototype in your header file and in the .i file are exactly
>> the same?
>>
>> Tom
>>
>>
>> > On Thu, Jun 20, 2013 at 3:16 PM, Tom Rondeau <address@hidden> wrote:
>> >>
>> >> On Thu, Jun 20, 2013 at 8:34 AM, Nemanja Savic <address@hidden>
>> >> wrote:
>> >> > Hi all,
>> >> >
>> >> > today I got really strange problem. Everything was in perfect order,
>> >> > I
>> >> > was
>> >> > designing a new block, and when finished I tried to test it, but the
>> >> > following error came:
>> >> >
>> >> >> ImportError:
>> >> >> /home/savi_ne/work/gnuradio/gr-test/build/swig/_test_swig.so:
>> >> >> undefined symbol: _ZN20test_synchro14enter_have_sofEv
>> >> >
>> >> >
>> >> > And what is the most important the error comes for the block called
>> >> > synchro
>> >> > which i designed few days ago and even this morning it was passing
>> >> > test.
>> >> > I use RHEL6. Tried with deleting everything and building again, also
>> >> > the
>> >> > same block with the different name. There are two or three posts on
>> >> > this
>> >> > problem, quite old and without solution.
>> >> >
>> >> > Thank you
>> >> >
>> >> >
>> >> > --
>> >> > Nemanja Savić
>> >>
>> >> Are you using the 3.7 API style or 3.6?
>> >>
>> >> These errors usually occur because of a missing piece in your SWIG .i
>> >> file. Or you might have accidentally removed something from your
>> >> public header file. Just walk through the files of this block again to
>> >> make sure that the 'enter_have_sof' is properly defined everywhere.
>> >> I'm sure it's something simple that's missing.
>> >>
>> >> Tom
>> >
>> >
>> >
>> >
>> > --
>> > Nemanja Savić
>
>
>
>
> --
> Nemanja Savić