CMake Warning (dev) at cmake/OpenCVDetectPython.cmake:140 (find_package): Policy CMP0148 is not set_policy cmp0148 is not set: the findpythoninterp an

1、原文

在opencv编译的时候

CMake Warning (dev) at cmake/OpenCVUtils.cmake:144 (find_package):
Policy CMP0148 is not set: The FindPythonInterp and FindPythonLibs modules
are removed.  Run "cmake --help-policy CMP0148" for policy details.  Use
the cmake_policy command to set the policy and suppress this warning.`
 
 
Call Stack (most recent call first):
cmake/OpenCVDetectPython.cmake:64 (find_host_package)
cmake/OpenCVDetectPython.cmake:271 (find_python)
CMakeLists.txt:643 (include)
This warning is for project developers.  Use -Wno-dev to suppress it.
 
 
CMake Warning (dev) at cmake/OpenCVUtils.cmake:144 (find_package):
Policy CMP0146 is not set: The FindCUDA module is removed.  Run "cmake --help-policy CMP0146" for policy details.  Use the cmake_policy command to
set the policy and suppress this warning.`
 
 
Call Stack (most recent call first):
cmake/OpenCVDetectCUDA.cmake:21 (find_host_package)
cmake/OpenCVFindLibsPerf.cmake:43 (include)
CMakeLists.txt:750 (include)
This warning is for project developers.  Use -Wno-dev to suppress it.

2、说明

报错的意思是cmake的规则没有被设置，之前的过时了。可参考https://cmake.org/cmake/help/latest/policy/CMP0148.html

3、解决

在OpenCVDetectPython.cmake添加下面内容即可。

if(POLICY CMP0148) 
cmake_policy(SET CMP0148 OLD)
endif()