Package manager and Travis

csgillespie · July 21, 2020, 2:54pm

I'm using travis and the public RSPM. The issue is

Error: package or namespace load failed for ‘Rcpp’ in dyn.load(file, DLLpath = DLLpath, ...):
 unable to load shared object '/home/travis/R/Library/Rcpp/libs/Rcpp.so':
  /home/travis/R/Library/Rcpp/libs/Rcpp.so: undefined symbol: EXTPTR_PTR
In addition: Warning message:
package ‘Rcpp’ was built under R version 4.0.2 
Execution halted
The command "Rscript -e "library('Rcpp')"" exited with 1.

travis.yml
Installing Rcpp
Build error from calling Rcpp
Build distribution

I've tried deleting the cache.

greg · July 21, 2020, 3:24pm

This is a bug in Rcpp where the package built on >= R 4.0.1 will fail to load on R 4.0.0:
https://www.mail-archive.com/r-devel@r-project.org/msg42398.html

github.com/RcppCore/Rcpp

avoid using EXTPTR_PTR

opened 11:03PM - 29 Jun 20 UTC

closed 01:39AM - 07 Jul 20 UTC

kevinushey

As it's not part of the official R API. See https://r.789695.n4.nabble.com/Possi…ble-ABI-change-in-R-4-0-1-td4764335.html for details. We should use `R_ExternalPtrAddtr()` instead. ``` kevinushey@cdrv:~/r/pkg/Rcpp [master] $ rg "EXTPTR_PTR" inst/include/Rcpp/module/class.h 170: vec_signed_method* mets = reinterpret_cast< vec_signed_method* >( EXTPTR_PTR( method_xp ) ) ; 197: vec_signed_method* mets = reinterpret_cast< vec_signed_method* >( EXTPTR_PTR( method_xp ) ) ; 219: vec_signed_method* mets = reinterpret_cast< vec_signed_method* >( EXTPTR_PTR( method_xp ) ) ; 396: prop_class* prop = reinterpret_cast< prop_class* >( EXTPTR_PTR( field_xp ) ) ; 403: prop_class* prop = reinterpret_cast< prop_class* >( EXTPTR_PTR( field_xp ) ) ; src/api.cpp 148: snprintf(buffer, 20, "%p", (void*)EXTPTR_PTR(xp)); src/module.cpp 56: return EXTPTR_PTR(xp) == 0; ``` Evidently this change was done way back in 2011 as well for some usages: https://github.com/RcppCore/Rcpp/blob/b1254701a899cb187f9a6917cb8d18c7f93290c7/ChangeLog#L6630-L6634

Is it possible to use R 4.0.1 or 4.0.2 on Travis? If not, you might have to install Rcpp from source for now. This should be fixed in the development version of Rcpp, but I don't think it's been released to CRAN yet.