c++ - ld: library not found for -lGL on Mac

问题描述

从https://github.com/openglredbook/examples 下载了OpenGL编程指南的样例代码，但是运行的时候报错，在build文件夹运行cmake .. 报错如下(运行环境是Mac)：

-- Try OpenMP C flag = [-fopenmp=libomp]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Try OpenMP C flag = [ ]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Try OpenMP C flag = [-fopenmp]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Try OpenMP C flag = [/openmp]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Try OpenMP C flag = [-Qopenmp]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Try OpenMP C flag = [-openmp]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Try OpenMP C flag = [-xopenmp]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Try OpenMP C flag = [+Oopenmp]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Try OpenMP C flag = [-qsmp]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Try OpenMP C flag = [-mp]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Try OpenMP CXX flag = [-fopenmp=libomp]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Try OpenMP CXX flag = [ ]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Try OpenMP CXX flag = [-fopenmp]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Try OpenMP CXX flag = [/openmp]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Try OpenMP CXX flag = [-Qopenmp]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Try OpenMP CXX flag = [-openmp]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Try OpenMP CXX flag = [-xopenmp]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Try OpenMP CXX flag = [+Oopenmp]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Try OpenMP CXX flag = [-qsmp]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Try OpenMP CXX flag = [-mp]-- Performing Test OpenMP_FLAG_DETECTED-- Performing Test OpenMP_FLAG_DETECTED - Failed-- Could NOT find OpenMP (missing: OpenMP_C_FLAGS OpenMP_CXX_FLAGS)-- Using Cocoa for window creation-- Using NSGL for context creation-- Building GLFW only for the native architecture-- Configuring done-- Generating done

然后运行make 报错如下：

[ 6%] Built target vermilion[ 15%] Built target glfw[ 16%] Linking CXX executable ../bin/12-imageprocessingld: library not found for -lGLclang: error: linker command failed with exit code 1 (use -v to see invocation)make[2]: *** [../bin/12-imageprocessing] Error 1make[1]: *** [CMakeFiles/12-imageprocessing.dir/all] Error 2make: *** [all] Error 2

在网上搜了好久但是都没有解决，大家知道这是怎么回事吗？

问题解答

问题已解决，CMakeLists.txt 文件26行https://github.com/openglredbook/examples/blob/master/CMakeLists.txt#L26 处，删除GL rt dl即可make成功。

我去下载了这个例子，在windows下能成功运行。如图：cmake 的make过程 选择的是visual2013 官方也说了visual 2013是可以的

使用visual studio 2013 打开项目编译忽略这些不必要的错误，打开bin文件夹，也可看到有很多可执行文件打开这些可执行文件因为你的是mac平台，官网也说了使用cmake Unix makefiles 也是可以成功运行的。你可以和我一样去官网下载一个cmake的gui版，你选择Mac OSX。然后输入正确路径，配置你要用到的generator，因为我要用到visual 2013 于是我选择了visual 2013.你 要根据你自己的情况选择。

然后打开你的generator去make整个项目，最后会在bin目录下生成可执行文件。完成！

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