[R-SIG-Mac] Problem with Rcpp on R-3.4 beta (r72492)

[Berend Hasselman]

Simon,

I have just checked the private package I mentioned in my previous post.
It is now made with clang4.

But the resulting .so (still) links to Apple's /usr/lib/libc++.1.dylib

I'll continue checking tomorrow. And check some packages using C++ link to R's libc++.

Berend


> On 18 Apr 2017, at 19:35, Simon Urbanek <simon.urbanek at r-project.org> wrote:
> 
> Berend,
> 
> 
>> On Apr 18, 2017, at 1:24 PM, Berend Hasselman <bhh at xs4all.nl> wrote:
>> 
>> 
>> Simon,
>> 
>> Thanks for the info.
>> I have downloaded R 3.4.0 RC r72531.
>> And installed clang 4.0.0 as you advised.
>> 
>> I already had Coudert's gfortran 6.1.
>> 
>> My Fortran packages checked without any problems; to be expected.
>> 
>> I am also in the possession of a private package (made by an ex colleague) that uses C++.
>> I did notice that this particular package linked to /usr/lib/libc++.1.dylib and NOT the one the binary version of Rcpp links to (/usr/local/clang4/lib/libc++.1.dylib).
>> 
>> However the "official" version of my package nleqslv which uses Fortran links to (a.o.) /Library/Frameworks/R.framework/Versions/3.4/Resources/lib/libgfortran.3.dylib as one would expect.
>> 
>> I also got the impression that R CMD check/INSTALL still uses Apple's clang++ and not the clang4 version..
>> 
>> What do I need to do (e.g. in my Makevars) to get  C++ stuff for R to use clang4 and its dylibs?
> 
> 
> Either
> export PATH=/usr/local/clang4/bin:$PATH
> for general purpose of for R specifically in ~/.R/Makevars
> CC=/usr/local/clang4/bin/clang
> CXX=/usr/local/clang4/bin/clang++
> 
> The main difference is that clang 4.0.0 supports C++17 features and OpenMP -- neither of which is supported by Apple clang.
> 
> 
>> Or will this be "fixed" in the final release of R 3.4.0?
> 
> 
> There was just one fix - the path in Rcpp (and other C++ packages) should not have been /usr/local - it should point to libc++ in R - that has been fixed and should be available in the next nightly build. The libc++ was mistakenly not copied.
> 
> 
>> And just wait for the official release and package for R3.4.0?
>> 
> 
> No, please, keep checking the nightlies from
> 
> http://r.research.att.com
> 
> the release will be exactly the same, so we have to make sure we'll find all the bugs *before* there release so please keep testing and reporting.
> 
> Thanks,
> Simon
> 
> 
> 
> 
>> Berend
>> 
>> 
>> 
>>> On 18 Apr 2017, at 16:06, Simon Urbanek <simon.urbanek at r-project.org> wrote:
>>> 
>>> Berend,
>>> 
>>> R for El Capitan is using clang 4.0.0 - you may need to install it from
>>> http://r.research.att.com/libs/clang-4.0.0-darwin15.6-Release.tar.gz
>>> In most cases you may get away with Apple clang, but likely not for new C++ features.
>>> 
>>> We will provide an official package soon with the R release.
>>> 
>>> Please keep testing and report issues - the changes for R 3.4.0 have been more radical as we target more recent macOS for better performance and features.
>>> 
>>> Thanks,
>>> Simon
>>> 
>>> 
>>>> On Apr 7, 2017, at 5:11 AM, Berend Hasselman <bhh at xs4all.nl> wrote:
>>>> 
>>>> 
>>>> Hi,
>>>> 
>>>> I have downloaded and installed R from R-3.4-r72492-branch-el-capitan.pkg.
>>>> My OS: OS X El Capitan (10.11.6)
>>>> 
>>>> My packages and all additional tests of these are working correctly.
>>>> 
>>>> I can install Rcpp.
>>>> Packages requiring Rcpp however don't seem to install or run.
>>>> 
>>>> 
>>>> Running otool -L on /Library/Frameworks/R.framework/Versions/3.4/Resources/library/Rcpp/libs/Rcpp.so
>>>> gives
>>>> 
>>>> Rcpp.so:
>>>> 	Rcpp.so (compatibility version 0.0.0, current version 0.0.0)
>>>> 	/Library/Frameworks/R.framework/Versions/3.4/Resources/lib/libR.dylib (compatibility version 3.4.0, current version 3.4.0)
>>>> 	/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 1259.0.0)
>>>> 	/usr/local/clang4/lib/libc++.1.dylib (compatibility version 1.0.0, current version 1.0.0)
>>>> 	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1226.10.1)
>>>> 
>>>> 
>>>> I don't have  /usr/local/clang4/lib/libc++.1.dylib.
>>>> I wouldn't know where to get it from. AFAIK The macOS Commandline Tools do not install stuff in /usr/local.
>>>> If this isn't a mishap: where do we get the necessary libc++.1.dylib from?
>>>> 
>>>> Berend Hasselman
>>>> 
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