Init with c ext

ext/mcp/extconf.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+require "mkmf"
+
+# Makes all symbols private by default to avoid unintended conflict
+# with other gems. To explicitly export symbols you can use RUBY_FUNC_EXPORTED
+# selectively, or entirely remove this flag.
+append_cflags("-fvisibility=hidden")
+
+create_makefile("mcp/mcp")

ext/mcp/mcp.c

@@ -0,0 +1,9 @@
+#include "mcp.h"
+
+VALUE rb_mMcp;
+
+RUBY_FUNC_EXPORTED void
+Init_mcp(void)
+{
+  rb_mMcp = rb_define_module("Mcp");
+}

ext/mcp/mcp.h

@@ -0,0 +1,6 @@
+#ifndef MCP_H
+#define MCP_H 1
+
+#include "ruby.h"
+
+#endif /* MCP_H */