[R-SIG-Mac] Testing R 3.4.0 RC r72542

[Berend Hasselman]

> On 19 Apr 2017, at 19:11, Simon Urbanek <simon.urbanek at r-project.org> wrote:
> 
>>> ......
>> 
>> I'm using https://cran.r-project.org  in R.app
>> I'll wait and try later or tomorrow.
>> 
> 
> Or use http://r.research.att.com as your CRAN mirror (it is the master for Mac binaries).
> 
> 

Done that.
Rcpp.so now links to libc++.1.dylib in the R framework.

> 
> The main problem is that it's really a user choice. If you want to make clang4 your system-wide default then you can create the symlinks, but if you want to keep both Apple clang and clang4 in parallel then you would use CC/CXX/LDFLAGS to adjust it instead. I'm not sure what is the best way to handle this - different people may have different preferences.
> 
> 
I've now done this in my Makevars. And all is well.

Thanks  for all of your efforts.

Berend