Question

用Cmake配置Opencv时，configure不过去 出现erroe如下：

CMake Error: Unable to open cache file for save. C:/Program Files/Opencv_VS2010/CMakeCache.txt
CMake Error at C:/Program Files/CMake 2.8/share/cmake-2.8/Modules/CMakeDetermineSystem.cmake:160 (FILE):
file Internal CMake error when trying to open file: C:/Program
Files/Opencv_VS2010/CMakeFiles/CMakeOutput.log for writing.
Call Stack (most recent call first):
CMakeLists.txt:56 (project)
CMake Error: Could not open file for write in copy operation C:/Program Files/Opencv_VS2010/CMakeFiles/CMakeSystem.cmake.tmp
CMake Error: : System Error: No such file or directory
CMake Error at C:/Program Files/CMake 2.8/share/cmake-2.8/Modules/CMakeDetermineSystem.cmake:172 (CONFIGURE_FILE):
configure_file Problem configuring file
Call Stack (most recent call first):
CMakeLists.txt:56 (project)
CMake Error: Could not open file for write in copy operation C:/Program Files/Opencv_VS2010/CMakeFiles/CMakeCCompiler.cmake.tmp
CMake Error: : System Error: No such file or directory
CMake Error at C:/Program Files/CMake 2.8/share/cmake-2.8/Modules/CMakeDetermineCCompiler.cmake:177 (CONFIGURE_FILE):
configure_file Problem configuring file
Call Stack (most recent call first):
CMakeLists.txt:56 (project)
CMake Error: Could not find cmake module file:C:/Program Files/Opencv_VS2010/CMakeFiles/CMakeCCompiler.cmake
CMake Error: Could not open file for write in copy operation C:/Program Files/Opencv_VS2010/CMakeFiles/CMakeCXXCompiler.cmake.tmp
CMake Error: : System Error: No such file or directory
CMake Error at C:/Program Files/CMake 2.8/share/cmake-2.8/Modules/CMakeDetermineCXXCompiler.cmake:182 (CONFIGURE_FILE):
configure_file Problem configuring file
Call Stack (most recent call first):
CMakeLists.txt:56 (project)
CMake Error: Could not find cmake module file:C:/Program Files/Opencv_VS2010/CMakeFiles/CMakeCXXCompiler.cmake
CMake Error: Could not open file for write in copy operation C:/Program Files/Opencv_VS2010/CMakeFiles/CMakeRCCompiler.cmake.tmp
CMake Error: : System Error: No such file or directory
CMake Error at C:/Program Files/CMake 2.8/share/cmake-2.8/Modules/CMakeDetermineRCCompiler.cmake:65 (CONFIGURE_FILE):
configure_file Problem configuring file
Call Stack (most recent call first):
C:/Program Files/CMake 2.8/share/cmake-2.8/Modules/Platform/Windows-cl.cmake:28 (ENABLE_LANGUAGE)
C:/Program Files/CMake

Answer 1

首先，我想说的是CMake的作用，每个编译器在调用头文件的时候都需要编译器配置好读取头文件(*.h)对应的(*.c||*.cpp)的路径，就像调用math.h你得告诉编译器对应的math.c要去什么地方寻找，但是新下载的OpenCV编译器是不知道相应的头文件还有lib文件要去哪里找的，所以程序猿们可以有以下两种方案：
1. 每次创建一个工程，找到调用文件的配置选项，然后手动添加，告诉编译器cv.h在哪，各种库文件(*.lib)文件在哪，当然既然涉及到系统的问题，少不了要去环境变量配置一下系统设置，不过配置环境变量仅仅用一次就可以了。
2. 为了省去每次创建工程都需要手动配置路径的麻烦，用CMake可以将Opencv的相关文件在哪里“永久地”告诉编译器，当然代价就是……失败几率很大（反正我总是配不好，一步出问题就会很蛋疼）

Answer 2

把openCV放到其他目录下，路径下不能有中文跟空格（Program Files带空格了），试试

Answer 3

现在的OPENCV2.3已经有预编译好的库了(对于VS2010来说)，不需要用CMAKE了。