How to declare linker symbol in C files

Hi,

I have done a further study, I find that no matter how you declare the __bss_start,such as:

extern alt_u8 __bss_start;

extern alt_u8* __bss_start;

extern alt_u16 __bss_start;

extern alt_u16* __bss_start;

extern alt_u32 __bss_start;

extern alt_u32* __bss_start;

Then

printf("\nThe value of __bss_start: %d\n", (unsigned int)&__bss_start);

You'll get the same answer which equal to the value of __bss_start in linker script.

So I think in order to use symbols defined in linker script, we should declare them with extern keyword, then use operator& to get their value.

Am I right?

Thanks for any reply,

David