rogry@MacBook-Pro-Roman HW Proj % make hello
cc hello.c -o hello
Undefined symbols for architecture x86_64:
"_main", referenced from:
implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [hello] Error 1
rogry@MacBook-Pro-Roman HW Proj % cat hello.c
rogry@MacBook-Pro-Roman HW Proj % cat hello.c
rogry@MacBook-Pro-Roman HW Proj % cat hello.c
rogry@MacBook-Pro-Roman HW Proj %