MacBook-1:CS <username>$ gcc -fsanitize=undefined  main.c
ld: file not found:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/8.0.0/lib/darwin/libclang_rt.ubsan_osx_dynamic.dylib
clang: error: linker command failed with exit code 1 (use -v to see invocation)