用arm-linux-gcc 出现警告

用arm-linux-gcc 出现警告：warning: incompatible implicit declaration of built-in function ‘strcpy’ 
虽是一个警告，但说是不相容，故上网查了一下看到：

In C, using a previously undeclared function constitutes an implicit declaration of the function. In an implicit declaration, the return type is int if I recall correctly. Now, GCC has built-in definitions for some standard functions. If an implicit declaration does not match the built-in definition, you get this warning.

To fix the problem, you have to declare the functions before using them; normally you do this by including the appropriate header. I recommend not to use the -fno-builtin-* flags if possible.

Instead of stdlib.h, you should try

#include  

That's where strcpy and strncpy are defined, at least according to the strcpy(2) man page.

The exit function is defined in stdlib.h, though, so I don't know what's going on there.

所以就在开头加了#include 解决问题

 

但是后来出现：-/sh:XXX:not found

两种可能：

一就是有可能/lib下面没有C库 就是没有glibc或者uclibc的动态库
二就是你板子上的C库和编译XXX链接时用的C库不一样, 差别太大

经查询知道缺少静态库，解决方法：1.把用到的库发到板子上

                                2.用静态编译 -static

用方法2解决问题

 

运行时出现：Segmentation fault