Hi Laurence, on 2020/12/15 上午2:44, Laurence Wagner via Gcc-help wrote: > Hello All, > > I have been using gfortran on my iMac Pro for several years. I recently upgraded my system to version 11.0.1 (Big Sur), and I now find that the compile process will not complete because "ld: library not found for -lSystem”. I guess some library search paths for your gfortran installed previously changed after big sur upgrade. One workaround is to specify the library path with the recent SDK, like "-L /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/lib/". If you don't have commandline SDK there, you can run `xcode-select --install` to get them installed (but you probably need to rerun it if you get recent 11.1 upgrade). BR, Kewen > I’m a mechanical engineer doing research in tribology issues, and I’m not deeply literate with computer systems…the installation of gfortran was quite a chore for me. Is there something that I can do (easily) that will restore my compiler functionality? >
