nobits for named section

[Bingfeng Mei]

Hello,
I came across an issue regarding named section and nobits. In 
the following example, I expected the c is placed is placed
in a section named .smemdata and nobits is set for the section
since "c" is initialized to zeros. 

int a = 0;

int b = 2000 * 512;
static int c[(200 * 512)] __attribute__((section(".smemdata")));

void foo()
{
   c[0] = 0;
}

Using both trunk x86_64 and arm-elf compilers, I found .smemdata
has progbits flag instead of nobits. Is this a bug? 

Cheers,
Bingfeng