title: boost build on centos 6.5 failed bootstrap?
body: <p>I bootstraped boost on a centos 6.5 cluster:</p>
  
  <pre><code>./bootstrap.sh --with-toolset=gcc --prefix=$HOME/opt 
  ./bjam -j12 toolset=gcc variant=release link=shared threading=multi address-model=64 cxxflags=-std=c++11 install
  </code></pre>
  
  <p>Which outputs:</p>
  
  <pre><code>32-bit                   : no  (cached)
      - 64-bit                   : no  (cached)
      - arm                      : no  (cached)
      - mips1                    : no  (cached)
      - power                    : no  (cached)
      - sparc                    : no  (cached)
      - x86                      : no  (cached)
      - combined                 : no  (cached)
      - lockfree boost::atomic_flag : no  (cached)
      - has_icu builds           : no  (cached)
      - zlib                     : no  (cached)
      - iconv (libc)             : no  (cached)
      - iconv (separate)         : no  (cached)
      - icu                      : no  (cached)
      - icu (lib64)              : no  (cached)
  - Boost.Locale needs either iconv or ICU library to be built.
  - Boost.Locale needs either iconv or ICU library to be built.
  - Boost.Locale needs either iconv or ICU library to be built.
  - Boost.Locale needs either iconv or ICU library to be built.
  - Boost.Locale needs either iconv or ICU library to be built.
  - Boost.Locale needs either iconv or ICU library to be built.
      - gcc visibility           : no  (cached)
      - long double support      : no  (cached)
  </code></pre>
  
  <p>I dont know why everything is no?
  At least 64bit should be yes, how ever boost builds, but I dont know if that is a good sign that everything is no?
  How can I fix this?</p>
  
  <p>Thanks a lot!</p>