And some people hand-write Makefiles for some simple projects. But those are the output of configure scripts (or CMake files), so hand-writing a configure scrip

And some people hand-write Makefiles for some simple projects. But those are the output of configure scripts (or CMake files), so hand-writing a configure script (or CMakeLists.txt) isn't hand-writing the resulting Makefile. Writing Makefiles by hand for a single platform and target is easy, I do it for task automation, but it's unusably complex for multi-platform software with multiple build configurations.