title: OSX 10.7.5: fatal error: 'ft2build.h' file not found
body: <p>I am trying to install a program called "ROOT" (<a href="http://root.cern.ch/drupal/content/installing-root-source" rel="noreferrer">http://root.cern.ch/drupal/content/installing-root-source</a>) using the "make" command, but I get the following error:</p>
  
  <pre><code>clang++ -O2 -m64 -pipe -Wshadow -W -Wall -Woverloaded-virtual -fsigned-char -fno-common -Iinclude -pthread -I/Users/builder/pisi-64bit/tmp/freetype-2.4.4-1/install/include/freetype2 -I/Users/builder/pisi-64bit/tmp/freetype-2.4.4-1/install/include -o graf2d/graf/src/TMathText.o -c /Users/alex/root/graf2d/graf/src/TMathText.cxx
      /Users/alex/root/graf2d/graf/src/TMathText.cxx:15:12: fatal error:
      'ft2build.h' file not found
  </code></pre>
  
  <p>however, I checked and my system has the ft2build.h already:</p>
  
  <pre><code>    locate ft2build.h
      /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk/usr/X11/include/ft2build.h
      /opt/X11/include/ft2build.h
      /opt/local/include/ft2build.h
      /usr/X11/include/ft2build.h
  </code></pre>
  
  <p>How can I do so that the installation can find the ft2build.h file?</p>