R help - May 2005 - Loading a dynamic library

Hi,

I'm trying to load a .dll library into R 2.1.0 on Windows using the
"dyn.load" function.  The library is compiled with gcc 3.3.3 on cygwin
1.5.16.  

I compile and link:

$ gcc -c myfile.cpp -o myfile.o [HRT]
$ gcc -shared myfile.o -o myfile.dll [HRT]

I then type, in the R console, 
> dynload("myfile.dll")[HRT]
And R hangs. 

Any help appreciated.

Thanks.

Will

_____________________________________________________________

William Astle.
PhD Student,
Department of Epidemiology and Public Health,
Imperial College London,
St Mary's Hospital Campus,
Norfolk Place,
Paddington.
W2 1NY.

wja [at] ic [dot] ac [dot] uk

On Thu, 19 May 2005, Astle, William J wrote:
> Hi,
>
> I'm trying to load a .dll library into R 2.1.0 on Windows using the
> "dyn.load" function.  The library is compiled with gcc 3.3.3 on
cygwin
> 1.5.16.
Please use the correct OS's DLLs: Cygwin is another OS hosted on Windows. 
This might work, but it is not as good an idea as using the recommended 
compilers, or indeed any other Windows compiler.
> I compile and link:
>
> $ gcc -c myfile.cpp -o myfile.o [HRT]
> $ gcc -shared myfile.o -o myfile.dll [HRT]
>
> I then type, in the R console,
>
>> dynload("myfile.dll")[HRT]
What is `dynload', and what does [HRT] mean?
> And R hangs.
Are you sure?  It is more likely that your DLL's initialization code 
hangs.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595