when I am on Windows, I use the msdos cmd shell and the Rtools when I am building an R package. It doesn't know anything about cygwin, doesn't need to know anything about cygwin, and bypasses the need to coordinate the two.
For everything else I use the cygwin bash. the cygwin shell doesn't know about the Rtools. Rich On Wed, Mar 12, 2014 at 12:10 AM, Brent <yhbr...@yahoo.com> wrote: > Background: > --I already had the latest 64 bit cygwin (1.7.28) installed on my Windows > 7 box > --I am a new R user; I just installed the latest 64 bit R today (3.0.3) > --a coworker told me that I also need to install RTools, so, I also > installed the latest RTools (3.1) from > http://cran.r-project.org/bin/windows/Rtools/ > --during RTools installation, I accepted all the defaults, including > "Cygwin DLLs" > --the sole additional item is that I checked to modify my PATH system env > var > > ~~~~~~~~~~ > > So what's my concern? That modifed PATH system env var. After installation, > PATH looks like > c:\Rtools\bin;c:\Rtools\gcc-4.6.3\bin;...;<my cygwin 64 bit path> > So the RTools stuff is before my original cygwin path. > > This choice means that RTools should work just fine. > > ***But will it screw up my normal cygwin sessions?*** > > In particular, if during a cygwin session a command is needed and a command > with that name is found in Rtools, I assume that that version will be used. > But it may not be the newer one expected by cygwin--could that cause problems? > > Warren Young's very detailed answer here > > https://stackoverflow.com/questions/18329233/is-it-advisable-to-switch-from-cygwin-32bit-to-cygwin-64bit > indicates that 32 and 64 bit cygwin do not mix well... > > ~~~~~~~~~~ > > Some more info. > > I accepted the installer's default to include "Cygwin DLLs", even tho I > already had 64 bit cygwin installed, because of this note: > > "The Cygwin tools have been updated to versions current as of November > 19, 2013. Cygwin now builds separate 32 bit and 64 bit versions; we include > 32 bit versions of the tools. If your system only has 64 bit Cygwin DLLs > installed, you will need to add our Cygwin DLLs to your path (or install the > 32 bit Cygwin DLLs into Cygwin)." > http://cran.r-project.org/bin/windows/Rtools/ > > But while web searching this issue, I came across a contrary recommendation: > > "Some of the R tools use the Cygwin DLLs, which are included. If you > already have Cygwin installed, you should not install these" > http://cran.r-project.org/bin/windows/Rtools/Rtools.txt > > (That last instruction, by the way, goes back many years, at least to 2008: > http://www.r-bloggers.com/wp-content/uploads/2008/12/Rtools1.txt > ) > > So, which instruction should I follow? > > ~~~~~~~~~~ > > I apologize in advance if this issues has already been discussed before, but > all attempts today to search this email list's archives at > http://tolstoy.newcastle.edu.au/R/ > always return 404 errors. > > I found a 2008 discussion of this issue here > http://www.r-bloggers.com/rtools-and-cygwin-on-ms-windows/ > which suggests temporarily hacking your PATH when launching RTools. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
