Error(s) in re-building vignettes:
  ...
--- re-building ‘converting.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Loading required namespace: cpp11test
Failed with error:  'there is no package called 'cpp11test''
--- finished re-building ‘converting.Rmd’

--- re-building ‘cpp11.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Warning in get_engine(options$engine) :
  Unknown language engine 'cpp11' (must be registered via knit_engines$set()).
Warning in get_engine(options$engine) :
  Unknown language engine 'cpp11' (must be registered via knit_engines$set()).
Warning in get_engine(options$engine) :
  Unknown language engine 'cpp11' (must be registered via knit_engines$set()).
Warning in get_engine(options$engine) :
  Unknown language engine 'cpp11' (must be registered via knit_engines$set()).
Warning in get_engine(options$engine) :
  Unknown language engine 'cpp11' (must be registered via knit_engines$set()).
Warning in get_engine(options$engine) :
  Unknown language engine 'cpp11' (must be registered via knit_engines$set()).
Warning in get_engine(options$engine) :
  Unknown language engine 'cpp11' (must be registered via knit_engines$set()).
Warning in get_engine(options$engine) :
  Unknown language engine 'cpp11' (must be registered via knit_engines$set()).
Warning in get_engine(options$engine) :
  Unknown language engine 'cpp11' (must be registered via knit_engines$set()).
Warning in get_engine(options$engine) :
  Unknown language engine 'cpp11' (must be registered via knit_engines$set()).
Warning in get_engine(options$engine) :
  Unknown language engine 'cpp11' (must be registered via knit_engines$set()).
Warning in get_engine(options$engine) :
  Unknown language engine 'cpp11' (must be registered via knit_engines$set()).
Warning in get_engine(options$engine) :
  Unknown language engine 'cpp11' (must be registered via knit_engines$set()).
Warning in get_engine(options$engine) :
  Unknown language engine 'cpp11' (must be registered via knit_engines$set()).
Warning in get_engine(options$engine) :
  Unknown language engine 'cpp11' (must be registered via knit_engines$set()).
Warning in get_engine(options$engine) :
  Unknown language engine 'cpp11' (must be registered via knit_engines$set()).
--- finished re-building ‘cpp11.Rmd’

--- re-building ‘internals.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
--- finished re-building ‘internals.Rmd’

--- re-building ‘motivations.Rmd’ using rmarkdown
Warning in engine$weave(file, quiet = quiet, encoding = enc) :
  Pandoc (>= 1.12.3) and/or pandoc-citeproc not available. Falling back to R Markdown v1.
Building shared library for Rcpp code chunk...
/home/ripley/developerstudio12.6/bin/CC -std=c++11 -library=stdcpp,CrunG3 -I"/home/ripley/R/cc/include" -DNDEBUG -I/home/ripley/R/Lib32/cpp11/include  -I/usr/local/include  -KPIC  -O -xlibmil -xtarget=native -xcache=generic -nofstore  -c /tmp/RtmpR6aaHK/working_dir/Rtmpx_aGjT/file5a4c4bbe17a/src/code_0.cpp -o /tmp/RtmpR6aaHK/working_dir/Rtmpx_aGjT/file5a4c4bbe17a/src/code_0.o
"/home/ripley/R/Lib32/cpp11/include/cpp11/r_string.hpp", line 16: Error: The operation "const cpp11::protect[extern "C" SEXPREC*(*)(const char*,cetype_t)]" is illegal.
"/home/ripley/R/Lib32/cpp11/include/cpp11/r_string.hpp", line 17: Error: The operation "const cpp11::protect[extern "C" SEXPREC*(*)(const char*,cetype_t)]" is illegal.
"/home/ripley/R/Lib32/cpp11/include/cpp11/r_vector.hpp", line 182: Error: The name cpp11::r_vector<double>::data_ is unusable except in a non-static member function.
"/home/ripley/R/Lib32/cpp11/include/cpp11/r_vector.hpp", line 185: Error: The name cpp11::r_vector<double>::data_p_ is unusable except in a non-static member function.
"/home/ripley/R/Lib32/cpp11/include/cpp11/r_vector.hpp", line 184: Error: The name cpp11::r_vector<double>::is_altrep_ is unusable except in a non-static member function.
"/home/ripley/R/Lib32/cpp11/include/cpp11/r_vector.hpp", line 186: Error: The name cpp11::r_vector<double>::length_ is unusable except in a non-static member function.
"/home/ripley/R/Lib32/cpp11/include/cpp11/doubles.hpp", line 79: Error: The operation "const cpp11::protect[extern "C" SEXPREC*(*)(unsigned,int)]" is illegal.
"/home/ripley/R/Lib32/cpp11/include/cpp11/doubles.hpp", line 100: Error: The operation "const cpp11::protect[extern "C" SEXPREC*(*)(unsigned,int)]" is illegal.
"/home/ripley/R/Lib32/cpp11/include/cpp11/doubles.hpp", line 101: Error: The operation "const cpp11::protect[extern "C" SEXPREC*(*)(SEXPREC*,int)]" is illegal.
"/tmp/RtmpR6aaHK/working_dir/Rtmpx_aGjT/file5a4c4bbe17a/src/code_0.cpp", line 3: Warning: attribute cpp11 is unsupported and will be skipped..
"/tmp/RtmpR6aaHK/working_dir/Rtmpx_aGjT/file5a4c4bbe17a/src/code_0.cpp", line 3: Error: "]" expected instead of "register".
"/tmp/RtmpR6aaHK/working_dir/Rtmpx_aGjT/file5a4c4bbe17a/src/code_0.cpp", line 3: Error: "]" expected instead of "register".
"/tmp/RtmpR6aaHK/working_dir/Rtmpx_aGjT/file5a4c4bbe17a/src/code_0.cpp", line 3: Error: "register" can only be used in a *** Error code 2
block or for a function argument.
"/tmp/RtmpR6aaHK/working_dir/Rtmpx_aGjT/file5a4c4bbe17a/src/code_0.cpp", line 3: Error: A declaration does not specify a tag or an identifier.
"/tmp/RtmpR6aaHK/working_dir/Rtmpx_aGjT/file5a4c4bbe17a/src/code_0.cpp", line 3: Error: Use ";" to terminate declarations.
"/tmp/RtmpR6aaHK/working_dir/Rtmpx_aGjT/file5a4c4bbe17a/src/code_0.cpp", line 3: Error: A declaration was expected instead of "]".
15 Error(s) and 1 Warning(s) detected.
make: Fatal error: Command failed for target `/tmp/RtmpR6aaHK/working_dir/Rtmpx_aGjT/file5a4c4bbe17a/src/code_0.o'
Current working directory /tmp/RtmpR6aaHK/working_dir/Rtmpx_aGjT/file5a4c4bbe17a/src
Quitting from lines 134-143 (motivations.Rmd) 
Error: processing vignette 'motivations.Rmd' failed with diagnostics:
unable to load shared object '/tmp/RtmpR6aaHK/working_dir/Rtmpx_aGjT/file5a4c4bbe17a/src/code_0.so':
  ld.so.1: R: fatal: /tmp/RtmpR6aaHK/working_dir/Rtmpx_aGjT/file5a4c4bbe17a/src/code_0.so: open failed: No such file or directory
--- failed re-building ‘motivations.Rmd’

SUMMARY: processing the following file failed:
  ‘motivations.Rmd’

Error: Vignette re-building failed.
Execution halted