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我用 gcc4.9 构建了可执行文件，带有-Og和-g3选项。当我尝试使用 gdb-7.10 进行调试时，我看不到变量值，都是 . 但是看起来有调试信息，我可以看到源文件，设置断点......除了值之外一切都很好。可能是什么原因？
-Og
-g3