On 8/25/2008 11:45 AM, rcoder wrote:
Hi Duncan,
Thanks for your reply. Would you know of a code + compiler combination that
works in R, so I can get a feel for the process?
Sure, the MinGW compilers in the Rtools should be fine. You get them
from www.murdoch-sutherland.com/Rtools. With those, building a DLL is
simply
R CMD SHLIB source.f
Duncan Murdoch
Thanks,
rcoder
Duncan Murdoch-2 wrote:
On 23/08/2008 8:44 PM, rcoder wrote:
Hi everyone,
I've created a dll for a fortran subroutine, and when I call the
subroutine
in R (via a wrapped function) a standard program shutdown windows error
prompt immediately pops up: the program has encountered a problem and
needs
to be shut down... send message / don't send message to MS... etc.
When I click "Don't send", the R consol does not then shut down, and
appears
to continue to execute, and task manager does not indicate "not
responding".
The problem is the execution takes too long, and I think the program is
just
hanging rather than executing. I have tested with different fortran code,
and the same thing happens, so I don't think it is anything to do with
that
side of things.
I created fortran code in a text editor, compiled using Plato3 IDE, then
converted the file into a dll using gFortran. I place the dll in the R
directory and it load in the console. The problem seems to occur when
defining the data types in R, for the variables in the fortran routine.
I was just wondering if anyone has experienced anything similar when
trying
to call fortran subroutines in R?
I haven't seen that, and haven't used that particular compiler, but it
has the symptoms of a mismatch in calling conventions. Does your
compiler pass arguments in registers? R uses what Windows calls the
cdecl calling convention in external calls.
Some old advice on using non-standard compilers is available here:
http://www.stats.uwo.ca/faculty/murdoch/software/compilingDLLs
I haven't updated it in a few years, but I think it is still current.
Duncan Murdoch
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