title: How to install clang header files?
body: <p>I have clang installed on my MacOS (in /usr/bin/clang ) which I think comes installed by default on Mac, however, when I try to include clang header files in a script, it says they are not found</p>
  
  <pre><code>Example.cpp:1:10: fatal error: 'clang/Driver/Options.h' file not found
  </code></pre>
  
  <p>Question: is it necessary (and possible, if so, how) to install the header files when clang is already installed and built on the MacOS system (or does clang itself need to be reinstalled at the same time as all the desired development tooling packages and their header files are installed)?</p>
  
  <pre><code>#include "clang/Driver/Options.h"
  #include "clang/AST/AST.h"
  #include "clang/AST/ASTContext.h"
  #include "clang/AST/ASTConsumer.h"
  #include "clang/AST/RecursiveASTVisitor.h"
  #include "clang/Frontend/ASTConsumers.h"
  #include "clang/Frontend/FrontendActions.h"
  #include "clang/Frontend/CompilerInstance.h"
  #include "clang/Tooling/CommonOptionsParser.h"
  #include "clang/Tooling/Tooling.h"
  #include "clang/Rewrite/Core/Rewriter.h"
  </code></pre>