4 files changed, 37 insertions, 4 deletions
diff --git a/mrbgems/mruby-sprintf/mrbgem.rake b/mrbgems/mruby-sprintf/mrbgem.rake
new file mode 100644
index 000000000..8772a5174
--- /dev/null
+++ b/mrbgems/mruby-sprintf/mrbgem.rake
@@ -0,0 +1,4 @@
+MRuby::Gem::Specification.new('mruby-sprintf') do |spec|
+  spec.license = 'MIT'
+  spec.authors = 'mruby developers'
+end
diff --git a/mrbgems/mruby-sprintf/src/kernel.c b/mrbgems/mruby-sprintf/src/kernel.c
new file mode 100644
index 000000000..8f54a3d85
--- /dev/null
+++ b/mrbgems/mruby-sprintf/src/kernel.c
@@ -0,0 +1,30 @@
+/*
+** kernel.c - Kernel module suppliment
+**
+** See Copyright Notice in mruby.h
+*/
+
+#include "mruby.h"
+
+mrb_value mrb_f_sprintf(mrb_state *mrb, mrb_value obj); /* in sprintf.c */
+
+void
+mrb_mruby_sprintf_gem_init(mrb_state* mrb)
+{
+  struct RClass *krn;
+
+  if (mrb->kernel_module == NULL) {
+    mrb->kernel_module = mrb_define_module(mrb, "Kernel"); /* Might be PARANOID. */
+  }
+  krn = mrb->kernel_module;
+
+  mrb_define_method(mrb, krn, "sprintf", mrb_f_sprintf, ARGS_ANY());
+  mrb_define_method(mrb, krn, "format",  mrb_f_sprintf, ARGS_ANY());
+}
+
+void
+mrb_mruby_sprintf_gem_final(mrb_state* mrb)
+{
+  /* nothing to do. */
+}
+
diff --git a/mrbgems/mruby-sprintf/src/sprintf.c b/mrbgems/mruby-sprintf/src/sprintf.c
index 192d44735..12ed05d13 100644
--- a/mrbgems/mruby-sprintf/src/sprintf.c
+++ b/mrbgems/mruby-sprintf/src/sprintf.c
@@ -6,8 +6,6 @@
 
 #include "mruby.h"
 
-#ifdef ENABLE_SPRINTF
-
 #include <stdio.h>
 #include <string.h>
 #include "mruby/string.h"
@@ -1091,5 +1089,3 @@ fmt_setup(char *buf, size_t size, int c, int flags, int width, int prec)
   *buf++ = c;
   *buf = '\0';
 }
-
-#endif	/* ENABLE_SPRINTF */
diff --git a/mrbgems/mruby-sprintf/test/sprintf.rb b/mrbgems/mruby-sprintf/test/sprintf.rb
new file mode 100644
index 000000000..52e94fb83
--- /dev/null
+++ b/mrbgems/mruby-sprintf/test/sprintf.rb
@@ -0,0 +1,3 @@
+##
+# Kernel#sprintf Kernel#format Test
+