title: How to solve the compile error in Android NDK?
body: <p>The directory structure as following:</p>
  
  <pre><code>- test/
  -- deps/
  --- librtmp/
  ---- rtmp.h
  ---- Android.mk -&gt; librtmp.a
  --- .../  #other deps
  -- Android.mk   -&gt; test.a
  -- src/
  --- flv_muxer.c
  </code></pre>
  
  <p>The flv_muxer.c code snippet:</p>
  
  <pre><code>#include "librtmp/rtmp.h"
  </code></pre>
  
  <p>The compile error:</p>
  
  <pre><code>$ ndk-build
  [armeabi-v7a] Compile thumb  : test &lt;= flv_muxer.c
  In file included from /Users/workdir/testproject/test/src/flv_muxer.c:9:0:
  /Users/workdir/testproject/test/src/flv_muxer.h:13:26: fatal error: librtmp/rtmp.h: No such file or directory
   #include "librtmp/rtmp.h"
                            ^
  compilation terminated.
  make: ***  Error 1
  </code></pre>