local gdb could not stop at breakpoint?

["yang xiaoli" <alula418 at hotmail dot com>]

I compile gdb6.0 for arm , now it works, but when I debug a program and set 
breakpoint at a line, it does't stop at breakpoint, it runs over, for 
example like this:

(gdb)l
1 #include <stdlib.h>
2 int main()
3 {
4    int a, b;
5    
6    a = 10;
7    b = 20;
8    printf("hello world\n");
9    printf("a+b= %d", a+b);
(gdb)b 6
(gdb)r
Startomg program...
hello world
a+b= 30

Program exited normally 
(gdb)

when I see breakpoints using command "info b" ,it display the breakpoints 
information normally, why it does not stop at breakpoints?

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