6 files changed, 3 insertions, 25 deletions
diff --git a/mrbgems/mruby-io/README.md b/mrbgems/mruby-io/README.md
index ccf56f970..2c5b762d8 100644
--- a/mrbgems/mruby-io/README.md
+++ b/mrbgems/mruby-io/README.md
@@ -171,6 +171,7 @@ Add the line below to your `build_config.rb`:
 ## License
 
 Copyright (c) 2013 Internet Initiative Japan Inc.
+Copyright (c) 2017 mruby developers
 
 Permission is hereby granted, free of charge, to any person obtaining a 
 copy of this software and associated documentation files (the "Software"), 
diff --git a/mrbgems/mruby-io/mrbgem.rake b/mrbgems/mruby-io/mrbgem.rake
index e4f0b7bb6..bd20f6d20 100644
--- a/mrbgems/mruby-io/mrbgem.rake
+++ b/mrbgems/mruby-io/mrbgem.rake
@@ -1,6 +1,6 @@
 MRuby::Gem::Specification.new('mruby-io') do |spec|
   spec.license = 'MIT'
-  spec.authors = 'Internet Initiative Japan Inc.'
+  spec.authors = ['Internet Initiative Japan Inc.', 'mruby developers']
   spec.summary = 'IO and File class'
 
   spec.cc.include_paths << "#{build.root}/src"
diff --git a/mrbgems/mruby-io/src/file.c b/mrbgems/mruby-io/src/file.c
index f9ccb6148..673decc20 100644
--- a/mrbgems/mruby-io/src/file.c
+++ b/mrbgems/mruby-io/src/file.c
@@ -7,12 +7,7 @@
 #include "mruby/data.h"
 #include "mruby/string.h"
 #include "mruby/ext/io.h"
-
-#if MRUBY_RELEASE_NO < 10000
-#include "error.h"
-#else
 #include "mruby/error.h"
-#endif
 
 #include <sys/types.h>
 #include <sys/stat.h>
diff --git a/mrbgems/mruby-io/src/file_test.c b/mrbgems/mruby-io/src/file_test.c
index 445bafde9..aadd1ac1c 100644
--- a/mrbgems/mruby-io/src/file_test.c
+++ b/mrbgems/mruby-io/src/file_test.c
@@ -7,12 +7,7 @@
 #include "mruby/data.h"
 #include "mruby/string.h"
 #include "mruby/ext/io.h"
-
-#if MRUBY_RELEASE_NO < 10000
-#include "error.h"
-#else
 #include "mruby/error.h"
-#endif
 
 #include <sys/types.h>
 #include <sys/stat.h>
diff --git a/mrbgems/mruby-io/src/io.c b/mrbgems/mruby-io/src/io.c
index 5bc88e047..32128fa07 100644
--- a/mrbgems/mruby-io/src/io.c
+++ b/mrbgems/mruby-io/src/io.c
@@ -10,12 +10,7 @@
 #include "mruby/string.h"
 #include "mruby/variable.h"
 #include "mruby/ext/io.h"
-
-#if MRUBY_RELEASE_NO < 10000
-#include "error.h"
-#else
 #include "mruby/error.h"
-#endif
 
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -66,14 +61,6 @@ static int mrb_io_modestr_to_flags(mrb_state *mrb, const char *modestr);
 static int mrb_io_flags_to_modenum(mrb_state *mrb, int flags);
 static void fptr_finalize(mrb_state *mrb, struct mrb_io *fptr, int quiet);
 
-#if MRUBY_RELEASE_NO < 10000
-static struct RClass *
-mrb_module_get(mrb_state *mrb, const char *name)
-{
-  return mrb_class_get(mrb, name);
-}
-#endif
-
 static struct mrb_io *
 io_get_open_fptr(mrb_state *mrb, mrb_value self)
 {
diff --git a/mrbgems/mruby-io/test/mruby_io_test.c b/mrbgems/mruby-io/test/mruby_io_test.c
index f5c55499b..1c31c5fe0 100644
--- a/mrbgems/mruby-io/test/mruby_io_test.c
+++ b/mrbgems/mruby-io/test/mruby_io_test.c
@@ -18,7 +18,7 @@ typedef int mode_t;
 #define open _open
 #define close _close
 
-#ifdef _MSC_VER
+#if defined(_MSC_VER) || defined(__MINGW32__)
 #include <sys/stat.h>
 
 static int