[op25-dev] Building under Ubuntu 12.04 - blocks gives error "op25.cc:3115:13: error: 'ptrdiff_t' does not name a type"

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Steve Glass stevie.glass at gmail.com
Wed May 2 05:09:54 UTC 2012

Try including stddef.h in op25.i rather than cstddef. I think the latter
may need a "using namespace std" declaration and the former should just

On 2 May 2012 13:09, Richard Clarke <richard at clarke.biz> wrote:

> **
> OK I've just upgraded my Ubuntu box to 12.04, from 11.04 (couldn't help
> myself). I'm trying to rebuild op25 but I'm getting the following error,
> followed by a string of relate ones (I'm guessing)
> Compiling blocks:
> op25.cc:3115:13: error: 'ptrdiff_t' does not name a type
> A Google search for this kind of error seems to be pointing to stricter
> typedef requirements by gcc 4.6 with the solution being to include an
> additional system header file cstddef. However I'm not sure where to
> include this in the op25 source. I tried putting it in the op25.i swig
> interface file so that it ends up in the generated op25.cc file however
> that doesn't appear to have worked.
> Anyone already solved this or can provide some guidance? Ubuntu 12.04
> appears to be using gcc 4.6.3
> Thanks
> Cheers
> Richard
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