安装gdbserver

1. cd /work/debug/gdb-7.4/gdb/gdbserver/  
2.  ./configure --host=arm-linux；（表示编译出来的gdbserver要运行在linux下） 
3.  make;此时会出现问题：

linux-arm-low.c:642: error: (Each undeclared identifier is reported only once

 linux-arm-low.c:642: error: for each function it appears in.)

解决方法：

1. echo $PATH；查看包含的路径，编译时会在这些路径里寻找头文件。此处有一 项：/work/tools/gcc-3.4.5-glibc-2.3.6/bin
2. cd /work/tools/gcc-3.4.5-glibc-2.3.6/;   grep "PTRACE_GETSIGINFO" * -nR;发现arm-linux/include/linux/ptrace.h:27: #define PTRACE_GETSIGINFO  0x4202
3. cd/work/debug/gdb-7.4/gdb/gdbserver;     
4. vi linux-arm-low.c;将#include 后边添加#include
5. make;  编译成功