Dir.chdir(File.dirname($0))
d = File.open("known_errors_def.cstub", "w")
IO.readlines("known_errors.def").each { |name|
next if name =~ /^#/
name.strip!
d.write <<CODE
#ifdef #{name}
itsdefined(#{name}, MRB_SYM(#{name}))
#else
itsnotdefined(#{name}, MRB_SYM(#{name}))
#endif
CODE
}