$ rvm install 1.9.1 --debug
<i> Installing Ruby from source to: /Users/same/.rvm/ruby-1.9.1-p243 </i>
<i> Extracting ruby-1.9.1-p243 ... </i>
<d> Executing: tar xzf /Users/same/.rvm/archives/ruby-1.9.1-p243.tar.gz -C /Users/same/.rvm/src </d>
<i> Configuring ruby-1.9.1-p243, this may take a while depending on your cpu(s)... </i>
<d> Executing: ./configure --prefix=/Users/same/.rvm/ruby-1.9.1-p243  --build=i386-apple-darwin9.8.0 --host=i386-apple-darwin9.8.0  </d>
<i> Compiling ruby-1.9.1-p243, this may take a while, depending on your cpu(s)... </i>
<d> Executing: make  </d>
<e> Error running 'make ', please check /Users/same/.rvm/log/ruby-1.9.1-p243/make.error.log </e>