I have an R package and I want to update it by giving the option to run a pre-compiled .dll made from a Fortran source, since by this way it is very fast.
The problem is that I'd like to have except .dll (Windows executables) the .so files (linux executables) in order for the package to continue be platform-independent.
Is there any way to produce both of them? I have downloaded 'Eclipse' tools - will they help for this reason? (I am working with Windows 7 and GCC GNU compilers for the moment; Cygwin also available).
Any suggestions? Thank you.
Dear Narendra, it's OK,
I have found the answer yesterday, thank you!
@Peter, why are you so aggressive in your last posts at RG? I cannot explain it...
After all RG has its own moderators.
The answer to my question was given in linkedin:
https://www.linkedin.com/groupAnswers?viewQuestionAndAnswers=&discussionID=5933284226626523141&gid=145550&goback=&trk=comment#commentID_null
That's the reason why I din't upload it here.
Exactly, but in general the answer was that it is not necessary to pre-compile the routines (as I thought about first). It suffices to upload the Fortran code inside the package. Then for each user, when installing it, a proper dll or so executable will be created.
A typical result page of a package includes about 10 different operational systems.
I thought that if I had two executable files (a .dll for Windows and an .so for Linux) then I could call them from the package, but I fear that it will not work for such a diversity.
So, maybe it is better to let the source for compilation at installing.
Dear Peter, the compilation is done ONCE, at the installing. Then a proper .dll file is put on a subfolder of the package installation folder, thus each time you execute a function from R this calls the ready .dll giving you fast results. (Just see an installed package at its folder on your computer and you will find the ready to be used 'dlls, provided that the package had a fortran source in its .tar.gz file that you could download)
Peter, do you use R? If so, try to install a package that uses somewhere a fortran subroutine. Then find the location where the package was installed in your PC and open the folder 'libs' and then either 'i386' or 'x64', depending on the windows system. There you will find the compiled subroutine as a dll file. That' s all.
I agree there are no miracles ! You either choose to make your code portable, in which case you provide the source code and let your IDE do the work, or you optimize/tweak the crap out of it and compile the modules yourself, but in that case you have to stick with the CPU/architecture you are working on. As they say, "there's no FREE LUNCH". What a pitty :(
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