Commented out precision from shaders. These examples were done on my new desk...

third_party/gles2_book/Chapter_9/Simple_TextureCubemap/Simple_TextureCubemap.c

 //
 // Book:      OpenGL(R) ES 2.0 Programming Guide
 // Authors:   Aaftab Munshi, Dan Ginsburg, Dave Shreiner
 // ISBN-10:   0321502795
 // ISBN-13:   9780321502797
 // Publisher: Addison-Wesley Professional
 // URLs:      http://safari.informit.com/9780321563835
 //            http://www.opengles-book.com
 //
 
@@ skipping 79 matching lines @@
    GLushort *indices = NULL;
    GLbyte vShaderStr[] =  
       "attribute vec4 a_position;   \n"
       "attribute vec3 a_normal;     \n"
       "varying vec3 v_normal;       \n"
       "void main()                  \n"
       "{                            \n"
       "   gl_Position = a_position; \n"
       "   v_normal = a_normal;      \n"
       "}                            \n";
-   
+
+   // TODO(alokp): Shaders containing "precision" do not compile.
    GLbyte fShaderStr[] =  
-      "precision mediump float;                            \n"
+      "//precision mediump float;                            \n"
       "varying vec3 v_normal;                              \n"
       "uniform samplerCube s_texture;                      \n"
       "void main()                                         \n"
       "{                                                   \n"
       "  gl_FragColor = textureCube( s_texture, v_normal );\n"
       "}                                                   \n";
 
    // Load the shaders and get a linked program object
    userData->programObject = esLoadProgram ( vShaderStr, fShaderStr );
 
@@ skipping 81 matching lines @@
 
    // Delete texture object
    glDeleteTextures ( 1, &userData->textureId );
 
    // Delete program object
    glDeleteProgram ( userData->programObject );
 
    // Delete vertex buffer objects
    glDeleteBuffers ( 3, userData->vboIds );
 }