title: error message in adding sqlite3 library in my project
body: <p>I have a C++ project and i want to use sqlite3 on it. i am using CMake to build and add some line to CMakeLists.txt,here it is: </p>
  
  <pre><code>project(Test)
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
  set(CMAKE_BUILD_TYPE Debug)
  cmake_minimum_required(VERSION 2.8)
  aux_source_directory(. SRC_LIST)
  add_executable(${PROJECT_NAME} ${SRC_LIST})
  set(CMAKE_CXX_FLAGS_DEBUG  "-g")
  
  find_path(SQLITE3_INCLUDE_DIR sqlite3.h)
  find_library(SQLITE3_LIBRARY sqlite3)
  if(NOT SQLITE3_INCLUDE_DIR)
    message(SEND_ERROR "Failed to find sqlite3")
  endif()
  if(NOT SQLITE3_LIBRARY)
    message(SEND_ERROR "Failed to find the sqlite3 library")
  endif()
  </code></pre>
  
  <p>when i want to rum cmake command, it get me<code>Failed to find sqlite3</code> and <code>Failed to find the sqlite3 library</code> and could find it.</p>
  
  <p>i am using ubuntu+qtcreator and version of sqlite3 that i have installed:</p>
  
  <pre><code>&gt; sqlite3 --version
  3.8.2 2013-12-06 14:53:30 27392018af4c38cc203a04b8013e2afdb1cebd0d
  </code></pre>
  
  <p>thanks to all...!</p>