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Dear R-users, After the reading of "Writing R extensions", "readme.packages", "Using external compilers with R", ..., I have tried to create a DLL for my Fortran file using the command: g77 --shared -o robeth.dll robeth.f and failed with several messages as : c:\temp/ccU8N5fb.o: ... undefined reference to 'realpr_' c:\temp/ccU8N5fb.o: ... undefined reference to 'dblepr_' c:\temp/ccU8N5fb.o: ... undefined reference to 'intpr_' c:\temp/ccU8N5fb.o: ... undefined reference to ...

...the tree packages from Terry Therneau > and Brian Ripley, To be fair, both of those went the other way, they were written as S(-PLUS) addons and then ported (by me) to R. The only example I am aware of going from R to S is my (still unfinished) lqs package, which started as a re-design of some ROBETH code and ended up much more comprehensive than what was available for S-PLUS. > As R is much faster on _some_ code than S-PLUS I have also done > simulations in R that I could not do in S-PLUS. Whether this counts as an > added feature is arguable, but it can certainly be useful. Agreed,...