title: Why do I get an error installing Ruby 1.9.3 using rvm on ubuntu 11.04?
body: <p>I have no Rubies install on the system through <code>rvm</code>:</p>
  
  <pre><code>~ % rvm list
  rvm rubies
  </code></pre>
  
  <p>I have 1.8.7 installed on the system:</p>
  
  <pre><code>~ % which ruby
  /usr/bin/ruby
  ~ % ruby -v
  ruby 1.8.7 (2010-08-16 patchlevel 302) [i686-linux]
  </code></pre>
  
  <p>While trying to install 1.9.3 using RVM I got the following errors:</p>
  
  <pre><code>% rvm install 1.9.3
  ERROR: Error running ' ./configure
   --prefix=/home/omni/.rvm/rubies/ruby-1.9.3-p0 --enable-shared --disable-install-doc  --with-gcc=clang --with-gcc=clang --with-gcc=clang --with-gcc=clang --with-gcc=clang --with-libyaml-dir=/home/omni/.rvm/usr ', please read /home/omni/.rvm/log/ruby-1.9.3-p0/configure.log ERROR: There has been an error while running configure. Halting the installation.
  </code></pre>
  
  <p>configure.log shows:</p>
  
  <pre><code>[2012-01-13 21:09:17]  ./configure
  --prefix=/home/omni/.rvm/rubies/ruby-1.9.3-p0 --enable-shared --disable-install-doc  --with-gcc=clang --with-gcc=clang --with-gcc=clang --with-gcc=clang --with-gcc=clang --with-libyaml-dir=/home/omni/.rvm/usr  
  configure: WARNING: unrecognized options: --with-libyaml-dir 
  
  checking build system type...
  i686-pc-linux-gnu 
  
  checking host system type... i686-pc-linux-gnu
  
  checking target system type... i686-pc-linux-gnu 
  
  checking whether the C compiler works... no 
  
  configure: error: in
  `/home/omni/.rvm/src/ruby-1.9.3-p0': configure: error: C compiler
  cannot create executables See `config.log' for more details
  </code></pre>
  
  <p>I tried running with <code>--with-gcc=clang</code> flag:</p>
  
  <pre><code>~ % rvm install 1.9.3 --with-gcc=clang
  
  ERROR: Error running '
  ./configure --prefix=/home/omni/.rvm/rubies/ruby-1.9.3-p0
  --enable-shared --disable-install-doc  --with-gcc=clang --with-gcc=clang --with-gcc=clang --with-gcc=clang --with-gcc=clang --with-libyaml-dir=/home/omni/.rvm/usr ', please read /home/omni/.rvm/log/ruby-1.9.3-p0/configure.log ERROR: There has
  been an error while running configure. Halting the installation.
  </code></pre>
  
  <p>My gcc version is:</p>
  
  <pre><code>~ % gcc -v 
  
  Using built-in specs. 
  
  COLLECT_GCC=gcc 
  
  COLLECT_LTO_WRAPPER=/usr/lib/i386-linux-gnu/gcc/i686-linux-gnu/4.5.2/lto-wrapper
  
  
  Target: i686-linux-gnu 
  
  Configured with: ../src/configure -v
  --with-pkgversion='Ubuntu/Linaro 4.5.2-8ubuntu4' --with-bugurl=file:///usr/share/doc/gcc-4.5/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.5 --enable-shared --enable-multiarch --with-multiarch-defaults=i386-linux-gnu --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib/i386-linux-gnu --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.5 --libdir=/usr/lib/i386-linux-gnu --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-plugin --enable-gold --enable-ld=default --with-plugin-ld=ld.gold --enable-objc-gc --enable-targets=all --disable-werror --with-arch-32=i686 --with-tune=generic --enable-checking=release --build=i686-linux-gnu --host=i686-linux-gnu --target=i686-linux-gnu 
  
  Thread model: posix 
  
  gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu4)
  </code></pre>
  
  <p>I've been at it for a long time and can't find a solution. </p>