title: How do you set CMAKE_C_COMPILER and CMAKE_CXX_COMPILER for building Assimp for iOS?
body: <p>When I try to build Assimp by running <code>build_ios.sh</code>, it tells me:</p>
  
  <pre><code>CMake Error: your C compiler: "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/llvm-gcc" was not found.   Please set CMAKE_C_COMPILER to a valid compiler path or name.
  CMake Error: your CXX compiler: "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/llvm-g++" was not found.   Please set CMAKE_CXX_COMPILER to a valid compiler path or name.
  </code></pre>
  
  <p>What I need the path to be is:</p>
  
  <pre><code>/Applications/XCode.app/Contents/Developer/Platforms/...
  </code></pre>
  
  <p>I've tried changing <code>DEVROOT</code> in <code>build_ios.sh</code> and <code>IPHONE_xxxx_TOOLCHAIN.cmake</code>, because that's what <code>CMAKE_C_COMPILER</code> etc seem to get generated from, but it still gives me the same errors.</p>