title: can anyone tell what this command will do
body: <pre><code>%build
  # Build all apps
  {
  for app in * ; do
      pushd $app
      sed -i '/XAW_/ s/)/, xaw7)/; /XAW_/ s/XAW_CHECK_XPRINT_SUPPORT/PKG_CHECK_MODULES/' configure.ac
      autoreconf -v --install
      %configure --disable-xprint
      make
      popd
  done
  }
  </code></pre>
  
  <p>can anyone tell me  what operations will sed command do on  configure.ac and autoreconf</p>