From: "koba (Shinji Kobayashi)" Date: 2012-05-26T10:28:43+09:00 Subject: [ruby-core:45246] [ruby-trunk - Bug #6498][Open] Cygwin needs $(DEFFILE) for extension libraries. Issue #6498 has been reported by koba (Shinji Kobayashi). ---------------------------------------- Bug #6498: Cygwin needs $(DEFFILE) for extension libraries. https://bugs.ruby-lang.org/issues/6498 Author: koba (Shinji Kobayashi) Status: Open Priority: Normal Assignee: Category: build Target version: ruby -v: ruby 1.9.3p231 (2012-05-25 revision 35794) [i386-cygwin] It seems that Bug #2684 is also valid for Cygwin. For example, "gem install glib2 atk" fails with many undefined references: ... linking shared-object atk.so Creating library file: libruby-atk.arbatkaction.o: In function `rg_set_description': /usr/local/lib/ruby/gems/1.9.1/gems/atk-1.1.3/ext/atk/rbatkaction.c:68: undefined reference to `_rbg_rval2cstr' /usr/local/lib/ruby/gems/1.9.1/gems/atk-1.1.3/ext/atk/rbatkaction.c:68: undefined reference to `_rbgobj_instance_from_ruby_object' rbatkaction.o: In function `rg_get_keybinding': /usr/local/lib/ruby/gems/1.9.1/gems/atk-1.1.3/ext/atk/rbatkaction.c:62: undefined reference to `_rbgobj_instance_from_ruby_object' ... Cygwin version: CYGWIN_NT-6.1-WOW64 nodename 1.7.15(0.260/5/3) 2012-05-09 10:25 i686 Cygwin Ruby configuration: CPPFLAGS=-I/usr/local/include LDFLAGS=-L/usr/local/lib ../ruby/configure --enable-shared --program-suffix=1.9 A possible patch and the error log is attached. -- http://bugs.ruby-lang.org/