[R] Can't rsync extsoft/3.6 when compiling R 3.6

[Martin Maechler]

>>>>> Shuguang Sun 
>>>>>     on Thu, 2 May 2019 12:57:37 +0800 writes:

    > Hi all,
    > When I try to compile R 3.6 in windows 10 in Rtools35, it raised the error message:
    > --8<---------------cut here---------------start------------->8---
    > make rsync-extsoft
    > (mkdir -p ../../extsoft; \
    > cd ../../extsoft; \
    > rsync --timeout=60 -rcvp --delete cran.r-project.org::CRAN/bin/windows/extsoft/3.6/ . ) 
    > receiving incremental file list
    > rsync: change_dir "/bin/windows/extsoft/3.6" (in CRAN) failed: No such file or directory (2)
    > --8<---------------cut here---------------end--------------->8---

    > There is no "windows/extsoft/3.6/" and only up to 3.5.

    > Best Regards,
    > Shuguang Sun

Indeed.
If you look at this FTP directory in a capabable browser (such
as Emacs), you see

    Dec 22 2014  3.2
    Jun 16 2016  3.3
    Jul  6 2016  3.4 -> 3.3
    May  8 2017  3.5 -> 3.3

So it seems the CRAN team (or the R Core release master?) forgot
to make that symbolic link there.

As workaround get the 3.5 version and "call it" 3.6.

Best,
Martin Maechler
ETH Zurich and R Core team


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