__attribute__((used)) provokes an error : 'used' attribute ignored

[Ian Lance Taylor]

Drasko DRASKOVIC <drasko.draskovic@gmail.com> writes:

> I wanted to prevent compiler from optimizing out several variables of
> Linux kerenel, so I can debug it in GDB, so I used
> __attribute__((used))  following this philosophy :
> http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0491c/BABCJJID.html
>
> However, trying to compile my kernel, I am getting the error :
> arch/mips/mm/tlb-r4k.c:73: error: 'used' attribute ignored
>
> Why is this happening ?
>
> Compiler version :
> Target: mips-openwrt-linux-uclibc
> gcc version 4.3.3 (GCC)

Please show us the relevant code.

Ian