* installing to library ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages’
* installing *source* package ‘vws’ ...
** this is package ‘vws’ version ‘0.3.0’
** package ‘vws’ successfully unpacked and MD5 sums checked
** using staged installation
** libs
using C++ compiler: ‘g++-16 (Debian 16.1.0-2) 16.1.0’
make[1]: Entering directory '/home/hornik/tmp/scratch/RtmpwjgKH2/R.INSTALL3264f820dc6425/vws/src'
g++-16 -std=gnu++20 -I"/home/hornik/tmp/R.check/r-devel-gcc/Work/build/include" -DNDEBUG -I../inst/include -I. -I'/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/Rcpp/include' -I'/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/fntl/include' -I/usr/local/include -D_FORTIFY_SOURCE=3 -fpic -g -O2 -Wall -pedantic -mtune=native -c RcppExports.cpp -o RcppExports.o
In file included from ../inst/include/typedefs.h:6,
from ../inst/include/FMMProposal.h:5,
from ../inst/include/vws.h:17,
from RcppExports.cpp:4:
../inst/include/optimize-hybrid.h: In function ‘vws::optimize_hybrid_result vws::optimize_hybrid(const fntl::dfd&, double, double, double, bool, unsigned int)’:
../inst/include/optimize-hybrid.h:104:36: error: ‘to_underlying’ is not a member of ‘fntl’
104 | out.status = fntl::to_underlying(opt_out.status);
| ^~~~~~~~~~~~~
In file included from ../inst/include/rejection.h:10,
from ../inst/include/vws.h:27:
../inst/include/rejection-args.h: In member function ‘vws::rejection_args::operator SEXP() const’:
../inst/include/rejection-args.h:99:47: error: ‘to_underlying’ is not a member of ‘fntl’
99 | Rcpp::Named("action") = fntl::to_underlying(action)
| ^~~~~~~~~~~~~
make[1]: *** [/home/hornik/tmp/R.check/r-devel-gcc/Work/build/etc/Makeconf:197: RcppExports.o] Error 1
make[1]: Leaving directory '/home/hornik/tmp/scratch/RtmpwjgKH2/R.INSTALL3264f820dc6425/vws/src'
ERROR: compilation failed for package ‘vws’
* removing ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/build/Packages/vws’