[R] help on dyn.load()

[Roger Bivand]

On Mon, 20 Feb 2006, Feng Tai wrote:

> Hi,
> 
> I used .C to call the C functions inside R. Everything works fine on the 
> linux sever.
> 
> I installed cygwin on my windows xp x64 platform and used rcmd shlib xxx.c 
> to compile. Everything works fine till now and xxx.dll is generated. But 
> when I use dyn.load("xxx.dll") in R, it will open another R window and the 
> original R window becomes "Not responding", nothing loaded in both R window. 
> Anyone has similar experiences before. Thanks a lot.

It has been the case that you are recommended not to build shared library 
objects under Cygwin, but rather to follow the instructions in:

http://www.murdoch-sutherland.com/Rtools/

carefully - that is build under Windows using the chosen tools. The other 
.dll files you report functioning correctly were built in this way, so the 
easiest thing to do is to build in the same way. 

> 
> BTW: I tried some other .dll files from the existed library. everything 
> works ok. so I think maybe something wrong with my C code. But why it works 
> fine on the linux server? Any guess or suggestion for this?
> 
> Feng
> 
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-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no