CMake 和 Conan：致命错误 - 没有这样的文件或目录

CMake and Conan: Fatal error - No such file or directory for

提问人：veltronic 提问时间：10/18/2023 最后编辑：veltronic 更新时间：10/19/2023 访问量：84

问：

我在构建我的 C++ 项目时遇到了一个问题，我需要一些帮助来解决它。我设置了一个项目，使用 Conan 管理依赖项，并创建了一个用于链接这些库的 CMakeLists.txt 文件。但是，当我尝试使用 cmake 命令构建项目时，遇到以下错误：

C:/Users/veltr/Desktop/Exercises/OpenGLProject/Application.cpp:1:10: fatal error: GLEW/glew.h: No such file or directory
    1 | #include <GLEW/glew.h>
      |          ^~~~~~~~~~~~~
compilation terminated.
make[2]: *** [CMakeFiles/OpenGLProject.dir/Application.cpp.obj] Błąd 1
make[1]: *** [CMakeFiles/OpenGLProject.dir/all] Błąd 2

我有一个 conan.txt 文件，我在其中指定要使用 conan install 安装的依赖项。 我创建了一个CMakeLists.txt文件来链接所需的库。 该项目似乎没有错误，但是当我尝试编译测试代码以检查功能时，我遇到了提到的致命错误。

  1. conanfile.txt

    [requires]
opengl/system
glfw/3.3.8
glew/2.2.0
[generators]
CMakeDeps
CMakeToolchain
[layout]
cmake_layout

  2. CMakeLists.txt

    cmake_minimum_required(VERSION 3.27)
project(OpenGLProject)

find_package(glfw3 REQUIRED)
find_package(OpenGL REQUIRED)
find_package(GLEW REQUIRED)

add_executable(${PROJECT_NAME} Application.cpp)

target_link_libraries(${PROJECT_NAME} glfw)
target_link_libraries(${PROJECT_NAME} GLEW::glew_s)
target_link_libraries(${PROJECT_NAME} OpenGL::GL)

  3. 应用程序.cpp

    #include <GLEW/glew.h>
#include <GLFW/glfw3.h>

int main(void)
{
    GLFWwindow* window;

    /* Initialize the library */
    if (!glfwInit())
        return -1;

    /* Create a windowed mode window and its OpenGL context */
    window = glfwCreateWindow(640, 480, "Hello World", NULL, NULL);
    if (!window)
    {
        glfwTerminate();
        return -1;
    }

    /* Make the window's context current */
    glfwMakeContextCurrent(window);

    /* Loop until the user closes the window */
    while (!glfwWindowShouldClose(window))
    {
        /* Render here */
        glClear(GL_COLOR_BUFFER_BIT);

        glBegin(GL_TRIANGLES);
        glVertex2f(-0.5f,-0.5f);
        glVertex2f(0.0f,  0.5f);
        glVertex2f(0.5f, -0.5f);
        glEnd();

        /* Swap front and back buffers */
        glfwSwapBuffers(window);

        /* Poll for and process events */
        glfwPollEvents();
    }

    glfwTerminate();
    return 0;
}

例如，“fmt”库 - 通过遵循类似的步骤 - 可以正确构建和工作，并且我可以使用它的所有可用 #include 指令。以上所有库都可以在 conan.io 上找到，因此它们应该是正确的。我做错了什么或不正确？

编辑#1 经过多次尝试解决问题，我找不到解决方案，最终使情况变得更糟。为了回到以前的状态，我必须为通过 Conan 下载的软件包以及我从网站下载的 GLEW 库添加绝对路径。这是我更新的CMakeLists.txt：

cmake_minimum_required(VERSION 3.27)
project(OpenGLProject)

# Set the paths to GLFW and OpenGL package configuration files
set(glfw3_DIR "C:/Users/veltr/Desktop/Exercises/OpenGLProject/build/Release/generators")
set(opengl_system_DIR "C:/Users/veltr/Desktop/Exercises/OpenGLProject/build/Release/generators")

# Find and link GLFW
find_package(glfw3 REQUIRED)

# Set the path to GLEW package configuration files 
set(GLEW_ROOT "C:/Users/veltr/Downloads/glew-2.1.0-win32/glew-2.1.0")
set(GLEW_INCLUDE_DIRS "${GLEW_ROOT}/include")
set(GLEW_LIBRARIES "${GLEW_ROOT}/lib/Release/Win32/glew32s.lib")

# Find and link GLEW
find_package(GLEW REQUIRED)

# Find and link OpenGL
find_package(OpenGL REQUIRED)

add_executable(${PROJECT_NAME} Application.cpp)

# Link the libraries to your project
target_link_libraries(${PROJECT_NAME} glfw)
target_link_libraries(${PROJECT_NAME} GLEW::GLEW)
target_link_libraries(${PROJECT_NAME} OpenGL::GL)

现在，当我构建项目时，我得到以下输出：

cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release ..
-- The C compiler identification is GNU 13.2.0
-- The CXX compiler identification is GNU 13.2.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: C:/msys64/mingw64/bin/cc.exe - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: C:/msys64/mingw64/bin/c++.exe - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Conan: Target declared 'glfw'
-- Conan: Target declared 'opengl::opengl'
-- Found GLEW: C:/Users/veltr/Downloads/glew-2.1.0-win32/glew-2.1.0/include (found version "2.1.0") 
-- Found OpenGL: opengl32
-- Configuring done (3.1s)
-- Generating done (0.1s)
-- Build files have been written to: C:/Users/veltr/Desktop/Exercises/OpenGLProject/build

如您所见，链接器找到了 GLEW，但不幸的是，当我使用 make 编译项目时，我仍然收到相同的错误。

编辑#2

cmake_minimum_required(VERSION 3.27)
project(OpenGLProject)
set(glfw3_DIR "C:/Users/veltr/Desktop/Exercises/OpenGLProject/build/Release/generators")
set(opengl_system_DIR "C:/Users/veltr/Desktop/Exercises/OpenGLProject/build/Release/generators")

find_package(glfw3 REQUIRED)
find_package(OpenGL REQUIRED)
find_package(GLEW REQUIRED)
include_directories(${GLEW_INCLUDE_DIRS})

add_executable(${PROJECT_NAME} Application.cpp)

target_link_libraries(${PROJECT_NAME} glfw)
target_link_libraries(${PROJECT_NAME} GLEW::glew_s)
target_link_libraries(${PROJECT_NAME} OpenGL::GL)

输出：

(...)
-- Detecting CXX compile features - done
-- Conan: Target declared 'glfw'
-- Conan: Target declared 'opengl::opengl'
-- Found OpenGL: opengl32   
CMake Error at C:/Program Files/CMake/share/cmake-3.27/Modules/FindPackageHandleStandardArgs.cmake:230 (message):
  Could NOT find GLEW (missing: GLEW_INCLUDE_DIRS GLEW_LIBRARIES)
Call Stack (most recent call first):
  C:/Program Files/CMake/share/cmake-3.27/Modules/FindPackageHandleStandardArgs.cmake:600 (_FPHSA_FAILURE_MESSAGE)
  C:/Program Files/CMake/share/cmake-3.27/Modules/FindGLEW.cmake:238 (find_package_handle_standard_args)
  CMakeLists.txt:8 (find_package)
(...)

编辑 #3 似乎正确构建：cmake -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE=conan_toolchain.cmake -DCMAKE_BUILD_TYPE=Release ..

(...)
-- Detecting CXX compile features - done
-- Conan: Target declared 'glfw'
-- Conan: Target declared 'opengl::opengl'
-- Found OpenGL: opengl32   
-- Conan: Component target declared 'GLEW::glew_s'
-- Conan: Target declared 'GLEW::GLEW'
-- Conan: Target declared 'glu::glu'
-- Configuring done (2.9s)
-- Generating done (0.1s)

但是使用make后，仍然出现相同的错误。

#EDIT 4

cmake_minimum_required(VERSION 3.27)
project(OpenGLProject)
set(glfw3_DIR "C:/Users/veltr/Desktop/Exercises/OpenGLProject/build/Release/generators")
set(opengl_system_DIR "C:/Users/veltr/Desktop/Exercises/OpenGLProject/build/Release/generators")

message(STATUS "GLEW_INCLUDE_DIRS: ${GLEW_INCLUDE_DIRS}")

# Set the path to GLEW (modify this to your actual GLEW directory)
set(GLEW_ROOT "C:/Users/veltr/Downloads/glew-2.1.0-win32/glew-2.1.0")

# Provide hints for GLEW using CMAKE_PREFIX_PATH
set(CMAKE_PREFIX_PATH "${GLEW_ROOT};${CMAKE_PREFIX_PATH}")


find_package(glfw3 REQUIRED)
find_package(OpenGL REQUIRED)
find_package(GLEW REQUIRED)

add_executable(${PROJECT_NAME} Application.cpp)

target_include_directories(${PROJECT_NAME} PUBLIC ${GLEW_INCLUDE_DIRS})

target_link_libraries(${PROJECT_NAME} glfw)
target_link_libraries(${PROJECT_NAME} OpenGL::GL)
target_link_libraries(${PROJECT_NAME} GLEW::GLEW)

#cmake -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE=conan_toolchain.cmake -DCMAKE_BUILD_TYPE=Release ..

我不得不从他们的站点手动安装 glew lib 并设置正确的路径。在应用程序.cpp中，我更改为，一切似乎都在工作。我怎样才能制作更通用的 Cmake 并避免硬编码路径？#include <GLEW/glew.h>#include <GL/glew.h>

C++ CMake GLEW 库 柯南

评论

0赞 uilianries 10/18/2023
我看到您的 cmake 命令中缺少工具链文件，使用它将您的配置文件与列出的依赖项相匹配非常重要。请看一下教程，它遵循所有正确使用conan的cmake命令：docs.conan.io/2/tutorial/consuming_packages/...
0赞 drodri 10/18/2023
您可以在 github.com/conan-io/conan/issues 中使用 Github 工单，以获得项目维护人员的支持
0赞 veltronic 10/18/2023
再说一遍：我尝试使用，它似乎构建正确。但是在'''之后，使'''仍然有同样的错误。cmake -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE=conan_toolchain.cmake -DCMAKE_BUILD_TYPE=Release ..
0赞 YurkoFlisk 10/19/2023
尝试在 Cmake 的输出中查看 Conan 是否（以及设置了什么）带有 include dirs 的变量。message(${GLEW_INCLUDE_DIRS})
0赞 veltronic 10/19/2023
使用我收到错误，说“使用不正确的参数数量调用消息”。所以尝试以其他方式做：或者两种方式似乎都有效并且我得到了输出，所以我想柯南没有正确设置 glewIncludeDirs。message(${GLEW_INCLUDE_DIRS})message(STATUS "GLEW_INCLUDE_DIRS:" ${GLEW_INCLUDE_DIRS})message(STATUS "GLEW_INCLUDE_DIRS: ${GLEW_INCLUDE_DIRS}")(...) -- Conan toolchain: C++ Standard 17 with extensions ON -- GLEW_INCLUDE_DIRS: -- Conan: Target declared 'glfw' (...)

答：

0赞 devyy 10/18/2023 #1

我认为问题是您没有在 Conan 工作区中正确包含 GLEW 标头。

使用 Conan 安装依赖项时，头文件不会自动提供给项目。有几个选项可以解决此问题：

将 GLEW 包含目录添加到 CMakeLists.txt：

# After find_package(GLEW ...)
include_directories(${GLEW_INCLUDE_DIRS})

将 GLEW 包含目录添加到 C++ 编译器包含路径：

add_executable(${PROJECT_NAME} Application.cpp)

target_include_directories(${PROJECT_NAME} PUBLIC ${GLEW_INCLUDE_DIRS})

target_link_libraries(${PROJECT_NAME} ...)

使用 conan_basic_setup（） CMake 宏为您设置所有包含目录：

include(conanbuildinfo.cmake)
conan_basic_setup()

add_executable(${PROJECT_NAME} Application.cpp)

target_link_libraries(${PROJECT_NAME} ...)

评论

0赞 veltronic 10/18/2023
-- Found OpenGL: opengl32 CMake Error at C:/Program Files/CMake/share/cmake-3.27/Modules/FindPackageHandleStandardArgs.cmake:230 (message): Could NOT find GLEW (missing: GLEW_INCLUDE_DIRS GLEW_LIBRARIES)我厌倦了这些步骤，对我不起作用。选中 Edit2。
1赞 drodri 10/18/2023
添加应该是没有必要的。应包含所有必要的信息。include_directories()target_link_libraries()
1赞 drodri 10/18/2023
这是非常传统的柯南，不再推荐。使用透明和集成是推荐的方法。include(conanbuildinfo.cmake)CMakeDepsCMakeToolchain

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