[R] R shared library (/usr/lib64/R/lib/libR.so) not found.

[Jan T Kim]

Hi Rolf & All,

I haven't built R in a while, but my general expectation of an
autotools based build & install would be that the default prefix
is /usr/local, rather than /usr. So I'd expect the shared libs
in /usr/local/lib, /usr/local/lib64 etc.

I also have a recollection that I once installed Rstudio for some
MOOC, and ended up putting a symlink in somewhere like /usr/lib* ,
because Rstudio was only available as a binary with the location
of the shared lib hard-baked into it.

Depending on your <various flags> this may be irrelevant, apologies
in that case.

Best regards, Jan


On Thu, Aug 23, 2018 at 10:57:35PM +1200, Rolf Turner wrote:
> 
> I *think* that this is an R question (and *not* an RStudio question!)
> 
> I have, somewhat against my better judgement, decided to experiment with
> using RStudio.
> 
> I downloaded and install RStudio.  Easy-peasy.  Nice lucid instructions.
> 
> Then I tried to start RStudio ("rstudio" from the command line)
> and got a pop-up window with the error message:
> 
> >R shared library (/usr/lib64/R/lib/libR.so) not found. If this
> >is a custom build of R, was it built with the --enable-R-shlib option?
> 
> Oops, no, I guess it wasn't.  So I carefully did a
> 
>     sudo make uninstall
>     make clean
>     make distclean
> 
> and then did
> 
>     ./R-3.5.1/configure <various flags>
> 
> making sure I added the --enable-R-shlib flag.
> 
> Then I did make and sudo make install. It all seemed to go ...
> but then I did
> 
>     rstudio
> 
> again and got the same popup error.
> 
> There is indeed *no* libR.so in /usr/lib64/R/lib.
> 
> There *is* a libR.so in /usr/lib/R/lib, but (weirdly) ls -l reveals that it
> dates from the my previous install of R-3.5.1 for which I *did not*
> configure with --enable-R-shlib.
> 
> Can anyone explain to me WTF is going on?
> 
> What should I do?  Just make a symbolic link from /usr/lib/R/lib/libR.so to
> /usr/lib64/R/lib/libR.so?
> 
> It bothers me that /usr/lib/R/lib/libR.so was not "refreshed" from my
> most recent install of R.
> 
> I plead for enlightenment.
> 
> cheers,
> 
> Rolf Turner
> 
> P.S. I'm running Ubuntu 18.04.  And the previous install of R was done under
> Ubuntu 18.04.
> 
> R. T.
> 
> -- 
> Technical Editor ANZJS
> Department of Statistics
> University of Auckland
> Phone: +64-9-373-7599 ext. 88276
> 
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