GLFW的最小示例由于架构X86_64的未定义符号而失败

Minimal example with GLFW fails because of undefined symbols for architecture x86_64

本文关键字：未定义 失败 X86 符号 于架构 GLFW      更新时间：2023-10-16

我正在尝试编译GLFW的以下最小示例：

#include <GLFW/glfw3.h>
#include <thread>
int main() {
    glfwInit();
    std::this_thread::sleep_for(std::chrono::seconds(1));
    glfwTerminate();
    return 0;
}

我的CMakeLists.txt文件是：

cmake_minimum_required(VERSION 3.9)
project(viewer)
set(CMAKE_CXX_STANDARD 11)
find_package(glfw3 3.2 REQUIRED)
include_directories(${GLFW_INCLUDE_DIRS})
add_executable(viewer main.cpp)
target_link_libraries(viewer ${GLFW_LIBRARIES})

如果我尝试编译代码，则会失败，以下错误消息：

[ 50%] Linking CXX executable visualiser
Undefined symbols for architecture x86_64:
  "_glfwInit", referenced from:
      _main in main.cpp.o
  "_glfwTerminate", referenced from:
      _main in main.cpp.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[3]: *** [visualiser] Error 1
make[2]: *** [CMakeFiles/visualiser.dir/all] Error 2
make[1]: *** [CMakeFiles/visualiser.dir/rule] Error 2
make: *** [visualiser] Error 2

我看到了类似的问题，例如：

  • 麻烦编译GLFW，未定义的符号
  • http://dudandan.com/2017/02/15/setup-glfw-and-glew/

但是他们的解决方案并没有真正帮助。

upd：按照@thomas_f的评论，我修改了我的 CMakeLists.txt文件如下：

cmake_minimum_required(VERSION 3.9)
project(viewer)
set(CMAKE_CXX_STANDARD 11)
find_package(glfw3 3.2 REQUIRED)
include_directories(${GLFW3_INCLUDE_DIR})
add_executable(viewer main.cpp)
target_link_libraries(viewer ${GLFW3_LIBRARY})
message(GLFW LIB: ${GLFW3_LIBRARY})

我还确保我的构建目录中没有CMakeCache.txt：

$ ls -a
.                 ..                .idea             CMakeLists.txt    cmake-build-debug main.cpp

但是，我仍然收到相同的错误消息。看来，

/Applications/CLion.app/Contents/bin/cmake/bin/cmake -DCMAKE_BUILD_TYPE=Debug -G "CodeBlocks - Unix Makefiles" ........./viewer
GLFWLIB:
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/denis/Documents/projects/theia/code/visualiser/cmake-build-debug
[Finished]

所以看来${GLFW3_LIBRARY}未定义。

来自 glfw3Config.cmake：

# - Config file for the glfw3 package
# It defines the following variables
#   GLFW3_INCLUDE_DIR, the path where GLFW headers are located
#   GLFW3_LIBRARY_DIR, folder in which the GLFW library is located
#   GLFW3_LIBRARY, library to link against to use GLFW

看来您是在引用错误的变量。另外，在这种情况下，无需调用include_directories()，因为GLFW显然安装在标准位置，即您的编译器已经知道在哪里可以找到它。

编辑：我能够重现链接器错误并将变量名称更改为GLFW3_LIBRARY修复了它。

澄清：将您的链接命令更改为：target_link_libraries(viewer ${GLFW3_LIBRARY})

更新如果您在Mac OS 上：如果您遇到的问题与OP相同，则可能是因为glfw3Config.cmake dim not 导出我中提到的变量回答。相反，它创建了导入的库glfw。在这种情况下，链接到glfw的正确方法就是简单地执行此操作：target_link_libraries(<target> glfw)。

如果使用brew安装了glfw，则应找到.cmake -FILES下：/usr/local/Cellar/glfw/<version>/lib/cmake/glfw3。

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