Hi, I compiled the code with -g -ggdb flags, but it seems gdb cannot show symbols correctly, instead it shows all ?? Remote debugging using /dev/pts/11 0xc0467118 in ?? () (gdb) where #0 0xc0467118 in ?? () #1 0xc077db2d in ?? () #2 0x00000000 in ?? () how to solve this problem? -- Thanks & Regards, Hushan Jia