Unable to compile with Rcpp - g++

Question

I use R version 4.0.2 (2020-06-22) -- "Taking Off Again". My system is W10 enterprise 1909.
I assume I have correctly installed Rtools40, since:
install.packages("jsonlite", type = "source") terminates correctly
I used some code from devtools: has_rtools() and it returns TRUE.
install.packages("jsonlite", type = "source")
essai de l'URL 'https://cran.rstudio.com/src/contrib/jsonlite_1.6.1.tar.gz'
Content type 'application/x-gzip' length 1057910 bytes (1.0 MB)
downloaded 1.0 MB
* installing *source* package 'jsonlite' ...
** package 'jsonlite' correctement décompressé et sommes MD5 vérifiées
** using staged installation
** libs
*** arch - i386
C:/Users/toto26/DOCUME~1/R/R-40~1.2/etc/i386/Makeconf:244: warning: overriding recipe for target '.m.o'
C:/Users/toto26/DOCUME~1/R/R-40~1.2/etc/i386/Makeconf:237: warning: ignoring old recipe for target '.m.o'
"C:/rtools40//mingw32/bin/"gcc -I"C:/Users/toto26/DOCUME~1/R/R-40~1.2/include" -DNDEBUG -Iyajl/api -D__USE_MINGW_ANSI_STDIO -O2 -Wall -std=gnu99 -mfpmath=sse -msse2 -mstackrealign -c base64.c -o base64.o
[...]
"C:/rtools40//mingw32/bin/"ar rcs yajl/libstatyajl.a yajl/yajl.o yajl/yajl_alloc.o yajl/yajl_buf.o yajl/yajl_encode.o yajl/yajl_gen.o yajl/yajl_lex.o yajl/yajl_parser.o yajl/yajl_tree.o
C:/rtools40//mingw32/bin/gcc -shared -s -static-libgcc -o jsonlite.dll tmp.def base64.o collapse_array.o collapse_object.o collapse_pretty.o escape_chars.o integer64_to_na.o is_datelist.o is_recordlist.o is_scalarlist.o modp_numtoa.o null_to_na.o num_to_char.o parse.o prettify.o push_parser.o r-base64.o register.o row_collapse.o transpose_list.o validate.o -Lyajl -lstatyajl -LC:/Users/toto26/DOCUME~1/R/R-40~1.2/bin/i386 -lR
installing to C:/Users/toto26/Documents/R/R-4.0.2/library/00LOCK-jsonlite/00new/jsonlite/libs/i386
*** arch - x64
C:/Users/toto26/DOCUME~1/R/R-40~1.2/etc/x64/Makeconf:244: warning: overriding recipe for target '.m.o'
C:/Users/toto26/DOCUME~1/R/R-40~1.2/etc/x64/Makeconf:237: warning: ignoring old recipe for target '.m.o'
"C:/rtools40//mingw64/bin/"gcc -I"C:/Users/toto26/DOCUME~1/R/R-40~1.2/include" -DNDEBUG -Iyajl/api -D__USE_MINGW_ANSI_STDIO -O2 -Wall -std=gnu99 -mfpmath=sse -msse2 -mstackrealign -c base64.c -o base64.o
[...]
"C:/rtools40//mingw64/bin/"ar rcs yajl/libstatyajl.a yajl/yajl.o yajl/yajl_alloc.o yajl/yajl_buf.o yajl/yajl_encode.o yajl/yajl_gen.o yajl/yajl_lex.o yajl/yajl_parser.o yajl/yajl_tree.o
C:/rtools40//mingw64/bin/gcc -shared -s -static-libgcc -o jsonlite.dll tmp.def base64.o collapse_array.o collapse_object.o collapse_pretty.o escape_chars.o integer64_to_na.o is_datelist.o is_recordlist.o is_scalarlist.o modp_numtoa.o null_to_na.o num_to_char.o parse.o prettify.o push_parser.o r-base64.o register.o row_collapse.o transpose_list.o validate.o -Lyajl -lstatyajl -LC:/Users/toto26/DOCUME~1/R/R-40~1.2/bin/x64 -lR
installing to C:/Users/toto26/Documents/R/R-4.0.2/library/00LOCK-jsonlite/00new/jsonlite/libs/x64
** R
** inst
** byte-compile and prepare package for lazy loading
** help
*** installing help indices
converting help for package 'jsonlite'
finding HTML links ... fini
base64 html
flatten html
fromJSON html
prettify html
rbind_pages html
read_json html
serializeJSON html
stream_in html
unbox html
validate html
** building package indices
** installing vignettes
** testing if installed package can be loaded from temporary location
*** arch - i386
*** arch - x64
** testing if installed package can be loaded from final location
*** arch - i386
*** arch - x64
** testing if installed package keeps a record of temporary installation path
* DONE (jsonlite)
The downloaded source packages are in
‘C:\Users\toto26\AppData\Local\Temp\RtmpQrssTP\downloaded_packages’
One of my issue may come from the location of make:
Sys.which("make")
make
"C:\\WINDOWS\\SYSTEM32\\make.exe"
instead of the expected
Sys.which("make")
## "C:\\rtools40\\usr\\bin\\make.exe"
I have asked my IT department to remove the system32 version from my laptop.
Nevertheless, I am not sure it is the root cause of my issues:
install.packages("Rcpp", type = 'source')
essai de l'URL 'https://cran.rstudio.com/src/contrib/Rcpp_1.0.4.6.tar.gz'
Content type 'application/x-gzip' length 2751467 bytes (2.6 MB)
downloaded 2.6 MB
* installing *source* package 'Rcpp' ...
** package 'Rcpp' correctement décompressé et sommes MD5 vérifiées
** using staged installation
** libs
*** arch - i386
C:/Users/toto26/DOCUME~1/R/R-40~1.2/etc/i386/Makeconf:244: warning: overriding recipe for target '.m.o'
C:/Users/toto26/DOCUME~1/R/R-40~1.2/etc/i386/Makeconf:237: warning: ignoring old recipe for target '.m.o'
"C:/rtools40//mingw32/bin/"g++ -std=gnu++11 -I"C:/Users/toto26/DOCUME~1/R/R-40~1.2/include" -DNDEBUG -I../inst/include/ -O2 -Wall -mfpmath=sse -msse2 -mstackrealign -c api.cpp -o api.o
"C:/rtools40//mingw32/bin/"g++ -std=gnu++11 -I"C:/Users/toto26/DOCUME~1/R/R-40~1.2/include" -DNDEBUG -I../inst/include/ -O2 -Wall -mfpmath=sse -msse2 -mstackrealign -c attributes.cpp -o attributes.o
"C:/rtools40//mingw32/bin/"g++ -std=gnu++11 -I"C:/Users/toto26/DOCUME~1/R/R-40~1.2/include" -DNDEBUG -I../inst/include/ -O2 -Wall -mfpmath=sse -msse2 -mstackrealign -c barrier.cpp -o barrier.o
"C:/rtools40//mingw32/bin/"g++ -std=gnu++11 -I"C:/Users/toto26/DOCUME~1/R/R-40~1.2/include" -DNDEBUG -I../inst/include/ -O2 -Wall -mfpmath=sse -msse2 -mstackrealign -c date.cpp -o date.o
"C:/rtools40//mingw32/bin/"g++ -std=gnu++11 -I"C:/Users/toto26/DOCUME~1/R/R-40~1.2/include" -DNDEBUG -I../inst/include/ -O2 -Wall -mfpmath=sse -msse2 -mstackrealign -c module.cpp -o module.o
"C:/rtools40//mingw32/bin/"g++ -std=gnu++11 -I"C:/Users/toto26/DOCUME~1/R/R-40~1.2/include" -DNDEBUG -I../inst/include/ -O2 -Wall -mfpmath=sse -msse2 -mstackrealign -c rcpp_init.cpp -o rcpp_init.o
"C:/rtools40//mingw32/bin/"g++ -std=gnu++11 -shared -s -static-libgcc -o Rcpp.dll tmp.def api.o attributes.o barrier.o date.o module.o rcpp_init.o -LC:/Users/toto26/DOCUME~1/R/R-40~1.2/bin/i386 -lR
/usr/bin/sh: line 8: "C:/rtools40//mingw32/bin/"g++ -std=gnu++11 : No such file or directory
aucune DLL n'a pas été créé
ERROR: compilation failed for package 'Rcpp'
* removing 'C:/Users/toto26/Documents/R/R-4.0.2/library/Rcpp'
Warning in install.packages :
installation of package ‘Rcpp’ had non-zero exit status
If I install the compiled version it works, but then I can't use Rcpp:
install.packages("Rcpp")
essai de l'URL 'https://cran.rstudio.com/bin/windows/contrib/4.0/Rcpp_1.0.4.6.zip'
Content type 'application/zip' length 3167452 bytes (3.0 MB)
downloaded 3.0 MB
package ‘Rcpp’ successfully unpacked and MD5 sums checked
The downloaded binary packages are in
C:\Users\toto26\AppData\Local\Temp\RtmpQrssTP\downloaded_packages
> Rcpp::evalCpp("2+2")
C:/Users/toto26/DOCUME~1/R/R-40~1.2/etc/x64/Makeconf:244: warning: overriding recipe for target '.m.o'
C:/Users/toto26/DOCUME~1/R/R-40~1.2/etc/x64/Makeconf:237: warning: ignoring old recipe for target '.m.o'
"C:/rtools40//mingw64/bin/"g++ -std=gnu++11 -I"C:/Users/toto26/DOCUME~1/R/R-40~1.2/include" -DNDEBUG -I"C:/Users/toto26/Documents/R/R-4.0.2/library/Rcpp/include" -I"C:/Users/toto26/AppData/Local/Temp/RtmpQrssTP/sourceCpp-x86_64-w64-mingw32-1.0.4.6" -O2 -Wall -mfpmath=sse -msse2 -mstackrealign -c file477046ea4828.cpp -o file477046ea4828.o
"C:/rtools40//mingw64/bin/"g++ -std=gnu++11 -shared -s -static-libgcc -o sourceCpp_2.dll tmp.def file477046ea4828.o -LC:/Users/toto26/DOCUME~1/R/R-40~1.2/bin/x64 -lR
/usr/bin/sh: line 8: "C:/rtools40//mingw64/bin/"g++ -std=gnu++11 : No such file or directory
Error in sourceCpp(code = code, env = env, rebuild = rebuild, cacheDir = cacheDir, :
Error occurred building shared library.
Any hints would be more than welcome.
Thanks a lot in advance.
Emmanuel
edit: here is my path:
> Sys.getenv('PATH')
[1] "C:\\rtools40\\usr\\bin;C:\\Users\\toto26\\Documents\\R\\R-4.0.2\\bin\\x64;C:\\rtools40\\usr\\bin;C:\\rtools40\\mingw64\\bin;C:\\ProgramData\\DockerDesktop\\version-bin;C:\\Program Files\\Docker\\Docker\\Resources\\bin;C:\\RBuildTools\\bin;C:\\RBuildTools\\mingw_64\\bin;C:\\RBuildTools\\mingw_32\\bin;C:\\Program Files (x86)\\Common Files\\Oracle\\Java\\javapath;C:\\WINDOWS\\system32;C:\\WINDOWS;C:\\WINDOWS\\System32\\Wbem;C:\\WINDOWS\\System32\\WindowsPowerShell\\v1.0\\;C:\\Program Files\\MATLAB\\R2018a\\runtime\\win64;C:\\Program Files\\MATLAB\\R2018a\\bin;C:\\Program Files (x86)\\PDFtk\\bin\\;C:\\WINDOWS\\System32\\OpenSSH\\;C:\\rtools40\\usr\\bin;C:\\RBuildTools\\3.5\\mingw_64\\bin;C:\\RBuildTools\\3.5\\bin;C:\\Python\\Scripts\\;C:\\Python\\;C:\\Users\\toto26\\AppData\\Local\\Microsoft\\WindowsApps;C:\\Users\\toto26\\AppData\\Local\\atom\\bin;C:\\Users\\toto26\\AppData\\Local\\Programs\\MiKTeX 2.9\\miktex\\bin\\x64\\;C:\\RBuildTools\\3.3\\mingw_64\\bin;C:\\MinGW\\bin;C:\\Users\\toto26\\AppData\\Local\\Microsoft\\WindowsApps;C:\\Users\\toto26\\AppData\\Local\\Pandoc\\;"