[PD] Linking externals on windows with mingw32

[Jamie Bullock]

> On 25 May 2017, at 14:24, zmoelnig at iem.at wrote:
> 
> On 05/25/2017 11:48 AM, Jamie Bullock wrote:
>>    undefined reference to `_imp__s_bang'
>>    undefined reference to `_imp__s_list'
> 
> according to one of the recent announcements of miller, the
> "s_bang"-class of symbols (which is what your undefined references are
> about), will go away in the near future.

Good :)

> you probably should update your code to use `gensym("bang")` rather than
> `s_bang` (and probably do local caching of the variable).

Thanks for the heads up.