Prints "Hello, Hurd!" to the standard out, without linking to glibc (or anything else). * 'make' builds the full, regular version. (.text size: 3102, file size: 4548) * 'make tiny' builds a size-optimized version, making use of '-Os' and other compiler flags. (.text size: 1650, file size: 2032) * 'make tinier' builds an extra-tiny version without error handling and other inessential stuff, and also strips the section headers from the resulting ELF. (.text size: 427, file size: 578) Debug symbols are built into a separate file, 'hello-hurd.debug'. Use 'symbol-file' in GDB to load it.