2 files changed, 49 insertions, 0 deletions
diff --git a/ext/bigdecimal/util/extconf.rb b/ext/bigdecimal/util/extconf.rb
new file mode 100644
index 0000000000..023b19ba7e
--- /dev/null
+++ b/ext/bigdecimal/util/extconf.rb
@@ -0,0 +1,40 @@
+# frozen_string_literal: false
+require 'mkmf'
+
+def windows_platform?
+  /cygwin|mingw|mswin/ === RUBY_PLATFORM
+end
+
+if windows_platform?
+  library_base_name = "ruby-bigdecimal"
+  case RUBY_PLATFORM
+  when /cygwin|mingw/
+    import_library_name = "libruby-bigdecimal.a"
+  when /mswin/
+    import_library_name = "bigdecimal-$(arch).lib"
+  end
+end
+
+checking_for(checking_message("Windows")) do
+  if windows_platform?
+    if defined?($extlist)
+      build_dir = "$(TARGET_SO_DIR)../"
+    else
+      base_dir = File.expand_path('../../../..', __FILE__)
+      build_dir = File.join(base_dir, "tmp", RUBY_PLATFORM, "bigdecimal", RUBY_VERSION)
+    end
+    case RUBY_PLATFORM
+    when /cygwin|mingw/
+      $LDFLAGS << " -L#{build_dir} -L.. -L .."
+      $libs << " -l#{library_base_name}"
+    when /mswin/
+      $DLDFLAGS << " /libpath:#{build_dir} /libpath:.."
+      $libs << " #{import_library_name}"
+    end
+    true
+  else
+    false
+  end
+end
+
+create_makefile('bigdecimal/util')
diff --git a/ext/bigdecimal/util/util.c b/ext/bigdecimal/util/util.c
new file mode 100644
index 0000000000..8d38d87852
--- /dev/null
+++ b/ext/bigdecimal/util/util.c
@@ -0,0 +1,9 @@
+#include "ruby.h"
+
+RUBY_EXTERN VALUE rmpd_util_str_to_d(VALUE str);
+
+void
+Init_util(void)
+{
+  rb_define_method(rb_cString, "to_d", rmpd_util_str_to_d, 0);
+}