From: Luis Lavena <luislavena@...>
Date: 2011-10-16T20:07:24+09:00
Subject: Re: 'gem install' help please

Kaye Ng wrote in post #1026815:
> Hi.
>
> When I type 'gem install RedCloth' in the command line, I get this:
> ---------------------------------------------------------------------------
> C:\Users\Kaye>gem install RedCloth
> Building native extensions.  This could take a while...
> ERROR:  Error installing RedCloth:
>         ERROR: Failed to build gem native extension.
>
> C:/Ruby192/bin/ruby.exe extconf.rb
> checking for main() in -lc... *** 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.
>

"Could not create Makefile due to some reason, probably lack of 
necessary libraries and/or headers. " [...]

"You have to install development tools first."

This might provide some information.

Are you using Ruby 1.9.2 provided from RubyInstaller?

http://rubyinstaller.org/downloads

If so, then you should have installed DevKit, available in the same page 
and with installation instructions here:

https://github.com/oneclick/rubyinstaller/wiki/Development-Kit

If you followed all the instructions, there is a high chance the problem 
you're having is covered in RubyInstaller's troubleshooting page:

https://github.com/oneclick/rubyinstaller/wiki/Troubleshooting#wiki-gems_fails_comspec_autorun

Please check all the other elements from above wiki page for other 
issues.

--
Luis Lavena

-- 
Posted via http://www.ruby-forum.com/.