lib.d should be automatically generated
Remove null entries from entity.d
Import core.stdc.stdarg in the modules that need it
Import core.stdc.float_ in the modules that need it
Import core.stdc.stdio in the modules that need it
Import core.stdc.stdlib in the modules that need it
Import core.stdc.ctype in the modules that need it
Import core.stdc.errno in the modules that need it
Import core.stdc.limits in the modules that need it
Import core.stdc.math in the modules that need it
Import core.stdc.time in the modules that need it
Import core.stdc.stdint in the modules that need it
Import core.stdc.string in the modules that need it
Don't disable the GC
Remove DDMD condition during printing
Always import all lib* files
Move backend stuff out of defs