Received the captioned error. The complete error message and the Makevars.win file are as follows:
> remotes::install_github("stan-dev/rstan", ref = "develop", subdir = "rstan/rstan", build_opts = "")
Downloading GitHub repo stan-dev/rstan@develop
/Rtools/bin/tar: stan-dev-rstan-7e3fff9/StanHeaders/inst/include/libsundials: Cannot create symlink to 'mathlib/lib/sundials_4.1.0/': No such file or directory
/Rtools/bin/tar: stan-dev-rstan-7e3fff9/StanHeaders/inst/include/src: Cannot create symlink to 'upstream/src/': No such file or directory
/Rtools/bin/tar: stan-dev-rstan-7e3fff9/StanHeaders/inst/include/stan: Cannot create symlink to 'mathlib/stan/': No such file or directory
/Rtools/bin/tar: Exiting with failure status due to previous errors
External tar failed with `--force-local`, trying without
/Rtools/bin/tar: stan-dev-rstan-7e3fff9/StanHeaders/inst/include/libsundials: Cannot create symlink to 'mathlib/lib/sundials_4.1.0/': No such file or directory
/Rtools/bin/tar: stan-dev-rstan-7e3fff9/StanHeaders/inst/include/src: Cannot create symlink to 'upstream/src/': No such file or directory
/Rtools/bin/tar: stan-dev-rstan-7e3fff9/StanHeaders/inst/include/stan: Cannot create symlink to 'mathlib/stan/': No such file or directory
/Rtools/bin/tar: Exiting with failure status due to previous errors
√ checking for file 'C:\Users\TlYim\AppData\Local\Temp\RtmpQ5aN8H\remotesa2014486033\stan-dev-rstan-7e3fff9\rstan\rstan/DESCRIPTION' (590ms)
- preparing 'rstan': (3.7s)
√ checking DESCRIPTION meta-information ...
- cleaning src
- installing the package to build vignettes (698ms)
√ creating vignettes (11m 54.7s)
- cleaning src (374ms)
- checking for LF line-endings in source and make files and shell scripts
- checking for empty or unneeded directories (8.4s)
- looking to see if a 'data/datalist' file should be added
- building 'rstan_2.19.1.tar.gz'
ERROR
cannot change to directory ''
Error in (function (command = NULL, args = character(), error_on_status = TRUE, :
System command error
In addition: Warning message:
In utils::untar(tarfile, ...) :
‘tar.exe -zxf "C:\Users\TlYim\AppData\Local\Temp\RtmpQ5aN8H\filea201629e3.tar.gz" -C "C:/Users/TlYim/AppData/Local/Temp/RtmpQ5aN8H/remotesa2014486033"’ returned error code 2
Makevars.win:
CXX14FLAGS=-O3 -march=native
CXX14 = g++ -m$(WIN) -std=c++1y
CXX11FLAGS=-O3 -march=native