4.0 regression: missing debug info for global variables in C with -O2

[Andrew Pinski]

On May 30, 2005, at 3:14 PM, Andrew Pinski wrote:

>
> On May 30, 2005, at 2:59 PM, Ulrich Weigand wrote:
>
>> Hello,
>>
>> we've just noticed a quite serious regression in debug info output
>> in GCC 4.0 over previous releases: when building with -funit-at-a-time
>> (which is on by default with -O2), *no* debug info for global 
>> variables
>> appears to be emitted at all.
>
> I could not reproduce it with any of the following examples on 
> i686-pc-linux-gnu
> with dwarf-2:

Never mind, gdb must use something else for variables.
You can reproduce it using:
static int i;
int main(void)
{
   i += 3;
   i *= 5;
   return 0;
}

and readelf and looking for the DW_TAG_variable tag.

Thanks,
Andrew Pinski