On Tue, 10 Feb 2004 14:27:21 +0100, [EMAIL PROTECTED] wrote : >We are trying to compile and run the ttest.c example that comes with R (in >C:\Program Files\R\rw1081\src\library\windlgs\src\ttest.c). After compiling >it with MS Visual C++ we load the DLL with dyn.load. > >So far it seems good, but when we try to call it from R (after running >C:\Program Files\R\rw1081\src\library\windlgs\R\windlgs.R) R crashes. > >We have tried changing the exports from DLL but have failed so far. Since I >have a guy helping me who is fluent in MS Visual C++ I believe we are >missing something crucial. Have anyone compiled and used the example above >using MS Visual C++? Has anyone done this using the gcc (or Mingw) compiler >on MS Windows? > >I would be very glad to find a complete example for compiling under MS >Windows.
There's some general information about this sort of thing on my web page, <http://www.stats.uwo.ca/faculty/murdoch/software/compilingDLLs/>. The readme.packages file contains specific instructions about VC++, but they may be out of date: I use gcc, and Brian Ripley (who wrote those instructions) doesn't use Windows as much as he used to. >From the symptoms ("when we call it R crashes"), my guess would be a problem with the calling convention, as described on my web page. You need to make sure your exports use the C calling convention, not stdcall. I don't know how to do that in VC++, but presumably your fluent helper would. If you do find what's wrong and it's a case of our documentation being out of date or incomplete, please write up a description of what works instead. This could be incorporated into readme.packages or put up on my web page. Duncan Murdoch ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html