From: "Joseph O." Date: 2012-01-14T04:11:10+09:00 Subject: installing Ruby-Debug-Base19 under Windows 7 When attempting to install ruby-debug19 on a Windows 7 partition, I have gotten the following error sequence: ERROR: Error installing ruby-debug19: ERROR: Failed to build gem native extension. C:/Ruby193/bin/ruby.exe extconf.rb checking for rb_method_entry_t.called_id in method.h... no checking for rb_control_frame_t.method_id in method.h... no *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. I have tried re-installing Ruby (version 1.9.3 p0) and DevKit, but this did not seem to change the result, nor did removing c:\MinGW\bin from the PATH variable. The error remains the same when using the latest version of the debug-base gem (ruby-debug-base19-0.11.26.gem) gets the same result. Adding the option '--with-ruby-include=C:\Ruby193\include' simply results in the error message: ERROR: While executing gem ... (OptionParser::InvalidOption invalid option: --with-ruby-include=C:\Ruby193\include I have been able to install other native gems such as rdiscount, which implies that the DevKit installation is at least partially correct. I am wondering if anyone can give any recommendations. -- Posted via http://www.ruby-forum.com/.