Library for __chkstk

[Seth Hovestol]

I'm working on inter-oping from rust into harbour, but I've been running into some issues with header files. 

In particular I get errors of this type:

     undefined reference to `__chkstk'

     undefined reference to `??_7type_info@@6B@'

     undefined reference to `__CxxFrameHandler3'

Looking around this seems to be a c++ related stdlib function. Has anyone run into this issue in the past and resolved it? 

The closest I've found is harbour\src\3rd\pcre\sjx86c.c which makes a reference to __chkstk.