尝试构建 opengl 精湛的示例代码时遇到麻烦答案

【问题标题】：trouble trying to build opengl superbible example code尝试构建 opengl 精湛的示例代码时遇到麻烦
【发布时间】：2014-04-12 00:54:38
【问题描述】：

所以我得到了超棒的第 6 版，并且正在尝试 cmake 并制作示例代码框架，但是得到了这个错误：

Scanning dependencies of target sb6
[  1%] Building CXX object CMakeFiles/sb6.dir/src/sb6/sb6.cpp.o
[  2%] Building CXX object CMakeFiles/sb6.dir/src/sb6/sb6ktx.cpp.o
[  3%] Building CXX object CMakeFiles/sb6.dir/src/sb6/sb6object.cpp.o
[  5%] Building CXX object CMakeFiles/sb6.dir/src/sb6/sb6shader.cpp.o
[  6%] Building C object CMakeFiles/sb6.dir/src/sb6/gl3w.c.o
Linking CXX static library lib/libsb6.a
[  6%] Built target sb6
Scanning dependencies of target alienrain
[  7%] Building CXX object CMakeFiles/alienrain.dir/src/alienrain/alienrain.cpp.o
Linking CXX executable bin/alienrain
CMakeFiles/alienrain.dir/src/alienrain/alienrain.cpp.o: In function `sb6::application::run(sb6::application*)':
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x21): undefined reference to `glfwInit'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x7a): undefined reference to `glfwOpenWindowHint'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x90): undefined reference to `glfwOpenWindowHint'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x9f): undefined reference to `glfwOpenWindowHint'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0xae): undefined reference to `glfwOpenWindowHint'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0xc4): undefined reference to `glfwOpenWindowHint'
CMakeFiles/alienrain.dir/src/alienrain/alienrain.cpp.o:alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0xee): more undefined references to `glfwOpenWindowHint' follow
CMakeFiles/alienrain.dir/src/alienrain/alienrain.cpp.o: In function `sb6::application::run(sb6::application*)':
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x12c): undefined reference to `glfwGetDesktopMode'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x18e): undefined reference to `glfwOpenWindow'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x1a8): undefined reference to `glfwSwapInterval'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x1f2): undefined reference to `glfwOpenWindow'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x22e): undefined reference to `glfwSetWindowTitle'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x238): undefined reference to `glfwSetWindowSizeCallback'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x242): undefined reference to `glfwSetKeyCallback'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x24c): undefined reference to `glfwSetMouseButtonCallback'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x256): undefined reference to `glfwSetMousePosCallback'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x260): undefined reference to `glfwSetMouseWheelCallback'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x277): undefined reference to `glfwEnable'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x27e): undefined reference to `glfwDisable'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x28f): undefined reference to `glfwGetWindowParam'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x373): undefined reference to `glfwGetTime'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x393): undefined reference to `glfwSwapBuffers'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x39d): undefined reference to `glfwGetKey'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x3bd): undefined reference to `glfwGetWindowParam'
alienrain.cpp:(.text._ZN3sb611application3runEPS0_[_ZN3sb611application3runEPS0_]+0x3f5): undefined reference to `glfwTerminate'
lib/libsb6.a(gl3w.c.o): In function `open_libgl':
gl3w.c:(.text+0xf): undefined reference to `dlopen'
lib/libsb6.a(gl3w.c.o): In function `close_libgl':
gl3w.c:(.text+0x2b): undefined reference to `dlclose'
lib/libsb6.a(gl3w.c.o): In function `get_proc':
gl3w.c:(.text+0x45): undefined reference to `glXGetProcAddress'
gl3w.c:(.text+0x66): undefined reference to `dlsym'
collect2: error: ld returned 1 exit status
make[2]: *** [bin/alienrain] Error 1
make[1]: *** [CMakeFiles/alienrain.dir/all] Error 2
make: *** [all] Error 2

我错过了什么？据我所知，我已经安装了所有依赖项。

【问题讨论】：

显然很多。您可能需要为要解析的dlopen 添加-ldl，为glXGetProcAddress 添加-lGL。我承认我不知道关于 CMake 的第一件事，我仍然使用 gmake，所以很遗憾我无法开始告诉你如何添加这些链接器标志。至于 GLFW 的东西，名称暗示 GLFW2。你确定你没有安装 GLFW3 认为它会满足你的依赖关系吗？它们不兼容，很多东西都改变了。
是的......这东西似乎有相当敌对的学习曲线。不仅 c++ 本身就是一门史诗般的语言，甚至围绕它的所有东西在编译和链接以及 makefile 和头文件等方面都......令人难以置信。

标签： opengl makefile cmake

【解决方案1】：

CMakeLists.txt 第 13 行有一个错误。 (https://github.com/openglsuperbible/sb6code/blob/master/CMakeLists.txt)

把“elif (UNIX)”改成“elseif (UNIX)”就OK了。

参考： https://www.opengl.org/discussion_boards/showthread.php/183902-SuperBible-6th-ed-Cannot-link-the-Linux-examples

【讨论】：

非常感谢！！准确！

【解决方案2】：

正如@AndonMColeman 建议的那样，你需要-lGL 和-ldl 在库列表的末尾。为此使用target_link_libraries 宏。

如果您从项目中提供 CMakeLists.txt，建议您添加/更改确切的字符串会更容易；)

【讨论】：