Why am I not able to install Ruby 1.9.2 on Mac OSX Lion? [closed]

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I am trying to install Ruby 1.9.2 on a brand new MacBook Air with OSX Lion (10.7.2) and I keep getting an error message during the installation process. I'm new to Ruby and starting out with Ruby on Rails 3 Tutorial, so I downloaded RVM and then ran the command "$ rvm install 1.9.2." and this is what happe开发者_JAVA百科ned:

Installing Ruby from source to: /Users/richardberger/.rvm/rubies/ruby-1.9.2-p290
ruby-1.9.2-p290 - #fetching 
ruby-1.9.2-p290 - #extracted to /Users/richardberger/.rvm/src/ruby-1.9.2-p290
Fetching yaml-0.1.4.tar.gz to /Users/richardberger/.rvm/archives
Extracting yaml-0.1.4.tar.gz to /Users/richardberger/.rvm/src
Configuring yaml in /Users/richardberger/.rvm/src/yaml-0.1.4.
ERROR: Error running ' ./configure --prefix="/Users/richardberger/.rvm/usr"  ',
please read /Users/richardberger/.rvm/log/ruby-1.9.2-p290/yaml/configure.log
Compiling yaml in /Users/richardberger/.rvm/src/yaml-0.1.4.
ERROR: Error running 'make ', please read
/Users/richardberger/.rvm/log/ruby-1.9.2-p290/yaml/make.log
Installing yaml to /Users/richardberger/.rvm/usr
ERROR: Error running 'make install', please read
/Users/richardberger/.rvm/log/ruby-1.9.2-p290/yaml/make.install.log
ruby-1.9.2-p290 - #configuring 
ERROR: Error running ' ./configure
--prefix=/Users/richardberger/.rvm/rubies/ruby-1.9.2-p290 --enable-shared
--disable-install-doc --with-libyaml-dir=/Users/richardberger/.rvm/usr ',
please read /Users/richardberger/.rvm/log/ruby-1.9.2-p290/configure.log
ERROR: There has been an error while running configure. Halting the installation.

Any help or alternative solutions would be greatly appreciated. And since I am new to this, please let me know if I need to provide more info.

Thanks!

UPDATE: here is the info from the configure log:

[2011-10-13 11:26:35]  ./configure
--prefix=/Users/richardberger/.rvm/rubies/ruby-1.9.2-p290
--enable-shared --disable-install-doc
--with-libyaml-dir=/Users/richardberger/.rvm/usr
configure: WARNING: unrecognized options: --with-libyaml-dir
checking build system type... i386-apple-darwin11.2.0
checking host system type... i386-apple-darwin11.2.0
checking target system type... i386-apple-darwin11.2.0
checking for gcc... no
checking for cc... no
checking for cl.exe... no
configure: error: in
`/Users/richardberger/.rvm/src/ruby-1.9.2-p290':
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details

Does this mean I need to download a C compiler (e.g. XCode?)

UPDATE (2): Problem solved by downloading Xcode!

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error: no acceptable C compiler found in $PATH

well, you don't have the Xtools development kit installed on your Mac! e.g. there is no C compiler...

you should pop-in that OS X DVD or the Flash Drive which came with your computer, and install Xtools, and after that try to install Ruby again..