Unable to load shared object when installing Rcpp 0.12.10

[abeburnett]

I had Rcpp installed, so I removed it, restarted R, and then attempted to install the new release. It failed saying that it couldn't find the shared object, and that it was unable to load the libc++.1.dylib library.

I'm running Mac OS X 10.12.4, and XCode 8.3 (which was a recent update--not sure if that is related to this issue).

Restarting R session...

> install.packages("Rcpp")
Installing package into ‘/Users/abeb/Library/R/3.3/library’
(as ‘lib’ is unspecified)
trying URL 'https://cran.rstudio.com/src/contrib/Rcpp_0.12.10.tar.gz'
Content type 'application/x-gzip' length 2446049 bytes (2.3 MB)
==================================================
downloaded 2.3 MB

* installing *source* package ‘Rcpp’ ...
** package ‘Rcpp’ successfully unpacked and MD5 sums checked
** libs
/usr/local/opt/llvm/bin/clang++ -I/usr/local/Cellar/r/3.3.3_1/R.framework/Resources/include -DNDEBUG -I../inst/include/ -I/usr/local/opt/gettext/include -I/usr/local/opt/llvm/include    -fPIC  -g -O2  -c Date.cpp -o Date.o
/usr/local/opt/llvm/bin/clang++ -I/usr/local/Cellar/r/3.3.3_1/R.framework/Resources/include -DNDEBUG -I../inst/include/ -I/usr/local/opt/gettext/include -I/usr/local/opt/llvm/include    -fPIC  -g -O2  -c Module.cpp -o Module.o
/usr/local/opt/llvm/bin/clang++ -I/usr/local/Cellar/r/3.3.3_1/R.framework/Resources/include -DNDEBUG -I../inst/include/ -I/usr/local/opt/gettext/include -I/usr/local/opt/llvm/include    -fPIC  -g -O2  -c Rcpp_init.cpp -o Rcpp_init.o
/usr/local/opt/llvm/bin/clang++ -I/usr/local/Cellar/r/3.3.3_1/R.framework/Resources/include -DNDEBUG -I../inst/include/ -I/usr/local/opt/gettext/include -I/usr/local/opt/llvm/include    -fPIC  -g -O2  -c api.cpp -o api.o
/usr/local/opt/llvm/bin/clang++ -I/usr/local/Cellar/r/3.3.3_1/R.framework/Resources/include -DNDEBUG -I../inst/include/ -I/usr/local/opt/gettext/include -I/usr/local/opt/llvm/include    -fPIC  -g -O2  -c attributes.cpp -o attributes.o
/usr/local/opt/llvm/bin/clang++ -I/usr/local/Cellar/r/3.3.3_1/R.framework/Resources/include -DNDEBUG -I../inst/include/ -I/usr/local/opt/gettext/include -I/usr/local/opt/llvm/include    -fPIC  -g -O2  -c barrier.cpp -o barrier.o
/usr/local/opt/llvm/bin/clang++ -dynamiclib -Wl,-headerpad_max_install_names -undefined dynamic_lookup -single_module -multiply_defined suppress -L/usr/local/opt/gettext/lib -L/usr/local/opt/llvm/lib -L/usr/local/Cellar/r/3.3.3_1/R.framework/Resources/lib -L/usr/local/opt/gettext/lib -L/usr/local/opt/llvm/lib -o Rcpp.so Date.o Module.o Rcpp_init.o api.o attributes.o barrier.o -F/usr/local/Cellar/r/3.3.3_1/R.framework/.. -framework R -lintl -Wl,-framework -Wl,CoreFoundation
installing to /Users/abeb/Library/R/3.3/library/Rcpp/libs
** R
** inst
** preparing package for lazy loading
** help
*** installing help indices
** building package indices
** installing vignettes
** testing if installed package can be loaded
Error in dyn.load(file, DLLpath = DLLpath, ...) : 
  unable to load shared object '/Users/abeb/Library/R/3.3/library/Rcpp/libs/Rcpp.so':
  dlopen(/Users/abeb/Library/R/3.3/library/Rcpp/libs/Rcpp.so, 6): Library not loaded: @rpath/libc++.1.dylib
  Referenced from: /Users/abeb/Library/R/3.3/library/Rcpp/libs/Rcpp.so
  Reason: image not found
Error: loading failed
Execution halted
ERROR: loading failed
* removing ‘/Users/abeb/Library/R/3.3/library/Rcpp’
Warning in install.packages :
  installation of package ‘Rcpp’ had non-zero exit status

The downloaded source packages are in
	‘/private/var/folders/lt/km9wf6gn5fv5m7m48qjyx6jh0000gq/T/RtmppQigQ3/downloaded_packages’

Any thoughts on things I can try to get Rcpp to install?

Thanks!

[eddelbuettel]

You appear to me mixing implementations of the C++ library. The short recommendation is to not do that.

Everything we have to say about macOS (nee OS X) is in the Rcpp FAQ. And that is actually a fair amount, thanks chiefly to @coatless for recent updates.

Rcpp itself builds and is tested at CRAN. If in doubt, I suggest you harmonize your build tools with theirs. I also intend to close this as it is unclear to me where there would be an error on our side. We do have a mailing list which may be more appropriate for questions such as this one.

[coatless]

@eddelbuettel 100% correct. The path of: /usr/local/opt/llvm/bin/clang++ indicates an llvm install off of brew. The compiler is built against libstdc++ while the R binary from CRAN is built using libc++. The blame for this can partially be attributed to Apple's need to stay with <= GPL-2 software (no bash 4 😢 ).

This is what is biting the effort behind rcppmlpack/RcppMLPACK1#10 and more recently #658.

[eddelbuettel]

@coatless Then we can close this just like #658, correct?

[coatless]

@eddelbuettel: yes.