After updating to macOS 13.0 (Ventura), somehow I got the following error when compile an R package with C++ code:
ld: warning: directory not found for option '-L/usr/local/gfortran/lib'
ld: library not found for -lgfortran macos ventura
Probably it is because the homebrew installed gfortran cannot be found by the system after the upgrading. I was in rush and did not have the time to figure out this. Instead, just went to this webpage and downloaded the latest gfortran package and installed it manually. After installation, I was able to compile the package again. Problem solved for now.