title: What is --without-x option for?
body: <p>I have a gcc compiler v 4.2.2 with next build options :</p>
  
  <pre><code>$ /opt/eldk-4.2/usr/bin/ppc_6xx-gcc -v
  Reading specs from /home/dejovivl/workspace/eldk-4.2/usr/bin/../lib/gcc/powerpc-linux/4.2.2/specs
  Target: powerpc-linux
  Configured with: /opt/eldk/build/ppc-2008-04-01/work/usr/src/denx/BUILD/crosstool-0.43/build/gcc-4.2.2-glibc-20070515T2025-eldk/powerpc-linux/gcc-4.2.2/configure --target=powerpc-linux --host=i686-host_pc-linux-gnu --prefix=/var/tmp/eldk.UZpAG7/usr/crosstool/gcc-4.2.2-glibc-20070515T2025-eldk/powerpc-linux --disable-hosted-libstdcxx --with-headers=/var/tmp/eldk.UZpAG7/usr/crosstool/gcc-4.2.2-glibc-20070515T2025-eldk/powerpc-linux/powerpc-linux/include --with-local-prefix=/var/tmp/eldk.UZpAG7/usr/crosstool/gcc-4.2.2-glibc-20070515T2025-eldk/powerpc-linux/powerpc-linux --disable-nls --enable-threads=posix --enable-symvers=gnu --enable-__cxa_atexit --enable-languages=c,c++,java --enable-shared --enable-c99 --enable-long-long --without-x
  Thread model: posix
  gcc version 4.2.2
  </code></pre>
  
  <p>Most options are easy to find, except for <code>--without-x</code>. So, what is this option for?</p>
  
  <p>The <a href="http://gcc.gnu.org/onlinedocs/gcc/Option-Summary.html" rel="nofollow">summary of gcc options</a> didn't help, since the option is not listed.</p>