title: Do I have to fully rebuild LLVM after editing a file?
body: <p>I am tweaking LLVM files and do a "make" in my build director to rebuild LLVM with the tweaked files, which is taking a while even though my changes were rather small (I understand that my one file will be affect other files). Do I have to use 'cmake --build .' to generate a new make file in the build directory or is it right to just call 'make'. And is it common for rebuilds to take a while?</p>