/usr/include/ruby-2.5.0/ruby/backward/rubyio.h is in ruby2.5-dev 2.5.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | #if defined __GNUC__
#warning use "ruby/io.h" instead of "rubyio.h"
#elif defined _MSC_VER
#pragma message("warning: use \"ruby/io.h\" instead of \"rubyio.h\"")
#endif
#include "ruby/io.h"
|