CMake找不到GLEW

Question

我正试图将GLEW链接到我的CMake项目，但没有取得什么成功。显然，它找不到GLEW_LIBRARIES。

我使用的是CLion 2019.3.4和MinGW。

到目前为止，我已经尝试过这样的方法：

1. 定义GLEW_LIBRARIES
2. 将GLEW_STATIC_LIBRARIES和GLEW_SHARED_LIBRARIES定义为FindGLEW.cmake文件(第41至45行)。
3. 做以上两件事。
4. 除了LIBRARIES之外，做1和2的是LIBRARY。

我不知道还能做什么。

以下是CMake列表以供参考：

cmake_minimum_required(VERSION 3.15)
project(myProject)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_EXE_LINKER_FLAGS "-static-libgcc -static-libstdc++")
set(CMAKE_MODULE_PATH "${CMAKE_HOME_DIRECTORY}/cmake_modules/")

# This part of the code is actually in a separate file,
# called LibrarySetup.cmake
#
# include(LibrarySetup.cmake)

if(WIN32)
    set(LIB_PREFIX "")
    set(LIB_SUFFIX ".dll")
elseif(UNIX)
    set(LIB_PREFIX "lib")
    set(LIB_SUFFIX ".lib")
endif()

set(GLFW_INCLUDE_DIR "include/glfw/include/")
set(GLFW_LIBRARY "include/glfw/lib/${LIB_PREFIX}glfw3${LIB_SUFFIX}")

set(GLEW_INCLUDE_DIR "include/glew/include/")
set(GLEW_SHARED_LIBRARIES "include/glew/lib/Release/Win32/glew32.lib")
set(GLEW_STATIC_LIBRARIES "include/glew/lib/Release/Win32/glew32s.lib")
set(GLEW_VERBOSE)

# And here the external file ends.

find_package(GLFW REQUIRED)
find_package(GLEW REQUIRED)

include_directories(${GLFW_INCLUDE_DIR} ${GLEW_INCLUDE_DIRS})

add_subdirectory(include/glfw)
add_executable(myProject main.cpp)
target_link_libraries(myProject ${GLFW_LIBRARY} ${GLEW_LIBRARIES})

还有错误：

~\AppData\Local\JetBrains\Toolbox\apps\CLion\ch-0\193.6494.38\bin\cmake\win\bin\cmake.exe -DCMAKE_BUILD_TYPE=Debug -G "CodeBlocks - MinGW Makefiles" "~\Documents\CLion Projects\myProject"
CMake Error at ~/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/193.6494.38/bin/cmake/win/share/cmake-3.15/Modules/FindPackageHandleStandardArgs.cmake:137 (message):
  Could NOT find GLEW (missing: GLEW_LIBRARIES)
Call Stack (most recent call first):
  ~/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/193.6494.38/bin/cmake/win/share/cmake-3.15/Modules/FindPackageHandleStandardArgs.cmake:378 (_FPHSA_FAILURE_MESSAGE)
  ~/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/193.6494.38/bin/cmake/win/share/cmake-3.15/Modules/FindGLEW.cmake:207 (find_package_handle_standard_args)
  CMakeLists.txt:12 (find_package)


-- Configuring incomplete, errors occurred!
See also "~/Documents/CLion Projects/myProject/cmake-build-debug/CMakeFiles/CMakeOutput.log".

[Failed to reload]

Answer 1

脚本的CMake版本要求附带FindGLEW，它应该为您查找库(即设置Glew目标、定义包含和库路径等)。您可以通过运行以下命令查看此模块的文档：

cmake --help-module findglew

向可执行文件提供GLEW的包含路径和库定义应该非常简单，如下所示：

find_package(GLEW REQUIRED)
add_executable(myProject main.cpp)
target_link_libraries(myProject GLEW::GLEW)

这将通过GLEW::GLEW目标的传递依赖关系提供包含路径和库路径。您不应该需要像您的示例那样手动设置路径。查找模块将搜索库的默认系统位置。如果它找不到它，您可以通过设置GLEW_ROOT变量来指向本地安装位置来向它提供提示。

set(GLEW_ROOT <my location of GLEW>)

你怎么安装GLEW的？您能否提供一个指示，说明它安装在您的系统上，这可能使您更容易了解为什么find模块失败？