CMake:如何在配置文件中实现版本检查?

Question

I Customize CMake package profileOpenCLConfig.cmakefor opencl-icd.

参考创建 CMake XXConfig.cmake 让其他 cmake 项目调用

现在，我遇到了一个问题：如何在配置文件中实现版本检查。

我在OpenCLConfig.cmake旁边创建了OpenCLConfigVersion.cmake，内容是：

#OpenCLConfigVersion.cmake
set(OpenCL_VERSION 2.2)
set(OpenCL_VERSION_MAJOR 2)
set(OpenCL_VERSION_MINOR 2)
SET(OpenCV_VERSION_PATCH 0)
SET(OpenCV_VERSION_TWEAK 0)

当我在其他CMakeLists中调用它时.txt，

那是find_package(OpenCL config)

我收到此错误：

CMake Error at CMakeLists.txt:10 (find_package): Could not find a 
configuration file for package "OpenCL" that is compatible with requested 
version "2". The following configuration files were considered but not 
accepted: C:/SDKs/ocl-icd/OpenCLConfig.cmake, version: unknown 

我已将OpenCL_DIR设置为"C:/SDKs/ocl-icd"在我的CMakeLists.txt。

我定制的OpenCLConfig.cmake内容是

set(OpenCL_FOUND TRUE)
set(OpenCL_ROOT_DIR "C:/SDKs/ocl-icd")
set(OpenCL_VERSION 2.2)
set(OpenCL_VERSION_MAJOR 2)
set(OpenCL_VERSION_MINOR 2)
SET(OpenCV_VERSION_PATCH 0)
SET(OpenCV_VERSION_TWEAK 0)
find_path(OpenCL_INCLUDE_DIR NAMES CL/cl.h PATHS "${OpenCL_ROOT_DIR}/include")
set(OpenCL_INCLUDE_DIRS "${OpenCL_INCLUDE_DIR}")
find_library(OpenCL_LIBRARY NAMES OpenCL.lib PATHS "${OpenCL_ROOT_DIR}/lib") 
set(OpenCL_LIBRARIES ${OpenCL_LIBRARY})

如何处理版本问题。

Answer 1

我已经解决了。

我指的是OpenCVConfig-version.cmakewrite myOpenCLConfigVersion.cmake

#OpenCLConfigVersion.cmake
set(OpenCL_VERSION 2.2)
set(PACKAGE_VERSION ${OpenCL_VERSION})
set(PACKAGE_VERSION_EXACT False)
set(PACKAGE_VERSION_COMPATIBLE False)
if(PACKAGE_FIND_VERSION VERSION_EQUAL PACKAGE_VERSION)
set(PACKAGE_VERSION_EXACT True)
set(PACKAGE_VERSION_COMPATIBLE True)
endif()
if(PACKAGE_FIND_VERSION_MAJOR EQUAL 2
AND PACKAGE_FIND_VERSION VERSION_LESS PACKAGE_VERSION)
set(PACKAGE_VERSION_COMPATIBLE True)
endif()

修改后正常工作。