CMake--find_path()

测试用例的目录结构
./cmake
　　|
　　+--- find_path/
　　　　　　　　|
　　　　　　　　+--- CMakeLists.txt
　　　　　　　　|
　　　　　　　　+--- test.h
本例中的实际目录为 D:\cmake\find_path

• short-hand signature
  find_path( name1 [path1 path2 …])

1. 用法1
   find_path(TEST_PATH find_path/test.h d:/cmake)
   message(${TEST_PATH})
   查看CMakeCache.txt中保存的结果为：
   //Path to a file.
   TEST_PATH:PATH=D:/cmake
2. 用法2
   find_path(TEST_PATH test.h d:/cmake/find_path)
   message(${TEST_PATH})
   查看CMakeCache.txt中保存的结果为：
   //Path to a file.
   TEST_PATH:PATH=D:/cmake/find_path

• full-hand signature
  find_path(
  <VAR>
  name | NAMES name1 [name2 ...]
  [HINTS path1 [path2 ... ENV var]]
  [PATHS path1 [path2 ... ENV var]]
  [PATH_SUFFIXES suffix1 [suffix2 ...]]
  [DOC "cache documentation string"]
  [NO_DEFAULT_PATH]
  [NO_CMAKE_ENVIRONMENT_PATH]
  [NO_CMAKE_PATH]
  [NO_SYSTEM_ENVIRONMENT_PATH]
  [NO_CMAKE_SYSTEM_PATH]
  [CMAKE_FIND_ROOT_PATH_BOTH |
  ONLY_CMAKE_FIND_ROOT_PATH |
  NO_CMAKE_FIND_ROOT_PATH]
  )

1. 用法1
   find_path(TEST_PATH NAMES test.h PATHS d:/cmake/find_path DOC "this is a test for find_path")
   message(${TEST_PATH})
   查看CMakeCache.txt中保存的结果为：
   //this is a test for find_path
   TEST_PATH:PATH=D:/cmake/find_path
2. 用法2
   //this is a test for find_path
   TEST_PATH:PATH=D:/cmake/find_path
   其它参数的用法参见CMake文档