undefined reference to `__stack_chk_guard' .. undefined reference to `__stack_chk

1. 编译出错

undefined reference to `__stack_chk_guard'

undefined reference to `__stack_chk_fail'

解决方法-1：添加libssp库

libssp 包含支持GCC堆栈保护函数的程序

解决方法-2 : disable gcc 编译参数　-fstack-protector-all(启用堆栈保护)，　将编译配置的-fstack-protector-all　改为　-fno-stack-protector（禁用堆栈保护）　

顺便记一下：openwrt　选译libssp库

make menuconfig --->Toolchain Options->Enable Stack-Smashing Protection support

退回主菜单--->Base system-->libssp

重新编译工程即可生成libssp.so*

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