Using pkgbuild:: find in R language_ Rtools check whether rtools is available and use sys The which function checks whether make exists, installs it if not, and binds R and rtools with the writelines

R Used in language pkgbuild::find_rtools(debug = TRUE) Check to see if there is Rtools、 Use Sys.which The function view make Whether there is 、 If not, install Rtools、 Use writeLines Function binding R and Rtools

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R Used in language pkgbuild::find_rtools(debug = TRUE) Check to see if there is Rtools、 Use Sys.which The function view make Whether there is 、 If not, install Rtools、 Use writeLines Function binding R and Rtools

#R Used in language pkgbuild::find_rtools(debug = TRUE) Check to see if there is Rtools、 Use Sys.which The function view make Whether there is 、 If not, install Rtools、 Use writeLines Function binding R and Rtools

​ #R Version and Rtools Need to match and view

 # install Rtools

# Use writeLines Function binding R and Rtools

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#R Used in language pkgbuild::find_rtools(debug = TRUE) Check to see if there is Rtools、 Use Sys.which The function view make Whether there is 、 If not, install Rtools、 Use writeLines Function binding R and Rtools

I really didn't find make So I can't install .

 > Sys.which("make")
make 
  "" 

> pkgbuild::find_rtools(debug = TRUE)
Found in Rtools 4.0 installation folder
[1] TRUE

> install.packages("D:/Downloads/RGtk2_2.20.36.3.tar.gz", repos = NULL, type = "source")
* installing *source* package 'RGtk2' ...
** Will succeed 'RGtk2' Package unpacking and MD5 And inspection
** using staged installation
** libs

*** arch - i386
Warning in system(cmd) : 'make' not found
ERROR: compilation failed for package 'RGtk2'
* removing 'D:/R/R-4.0.5/library/RGtk2'
Warning in install.packages :
  installation of package ‘D:/Downloads/RGtk2_2.20.36.3.tar.gz’ had non-zero exit status

 #R Version and Rtools Need to match and view

 # install Rtools

# Use writeLines Function binding R and Rtools

# Do the following （ Remember if there is no response after the operation , Need to restart Rstudio）

writeLines('PATH="${RTOOLS40_HOME}\\usr\\bin;${PATH}"', con = "~/.Renviron")

> Sys.which("make")
                                      make 
"D:\\Rtools\\rtools40\\usr\\bin\\make.exe" 

Reference resources ：R

Reference resources ：Index of /src/contrib/Archive/RGtk2