I was installing R packages (the httpuv package, but I imagine others would generate the same problem) on my Ubuntu server today and I got a very strange error message:
g++: error: Welcome: No such file or directory
g++: error: to: No such file or directory
g++: error: R!: No such file or directory
It was a problem with my .Rprofile.site file. That’s why it looks funny, because R is saying “Welcome to R”, but for some reason this is messing with g++. In my case it seemed to be generated by running R as sudo, but I need to do that to make the package library writable. Just invoke R at the terminal with:
and it will be fixed.