title: Compilation error - missing zlib.h
body: <p>I am trying to compile software on Blue Gene Q using IBM XL compilers and I got this error message:</p>
  
  <pre><code>"iostreams/zlib.cpp", line 19.10: 1540-0836 (S) The #include file "zlib.h" is not found.
  make[3]: *** [zlib.o] Error 1
  </code></pre>
  
  <p>I have installed a new version of zlib and updated <code>LD_LIBRARY_PATH</code> with <code>$HOME/zlib/include</code></p>
  
  <p>Am I missing something?</p>