undefined reference to 'glColor4f'

在你的问题中，你提到了一个编译错误：undefined reference to 'glColor4f'。这个错误通常意味着你的代码中引用了一个名为'glColor4f'的函数，但编译器找不到该函数的定义。根据引用中的信息，'glColor4f'函数被用来设置当前绘图颜色，并且它接受四个浮点数作为参数。根据引用的警告，错误可能是由于忘记链接'libGL'和'libGLU'库引起的。你可以尝试在链接阶段添加这些库来解决这个问题。比如，在gcc编译命令中添加'-lGL'和'-lGLU'来链接这两个库，如'gcc -lglut -lGL -lGLU transformation.c'。这样，编译器就能找到'glColor4f'函数的定义并成功编译你的代码。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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