[R-SIG-Mac] unable to install from source packages needing compiled C code

[Simon Urbanek]

Adrian,


> On Dec 3, 2021, at 10:12 AM, Adrian Dușa <dusa.adrian using gmail.com> wrote:
> 
> Thank you Simon,
> 
> I have the official Apple CLT, but not the full Xcode. If needed I can install that as well, with a difference of about 10GB more space getting used.
> This is what I get:
> 
> $ xcode-select -p
> /Library/Developer/CommandLineTools
> 
> $ xcrun --show-sdk-path
> /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
> 
> $ which clang
> /usr/local/opt/llvm/bin/clang
> 


^^^-- this is your problem. You're not using Xcode so that's exactly what I said, you have a broken compiler. Remove /usr/local/opt and it should work.

Cheers,
Simon