Hi, I have recently switched to using GCC 4.6.1 (from 4.5.1) for AVR target which supports only DWARF2 format. Now I notice a change in .debug_line section format in 4.6.1. A quick look at the assembly shows that '.loc' directives are emitted with discriminators.
Firstly, aren't discriminators introduced in DWARF 4? Little more digging shows that the following fix is missing in 4.6.1 release. It breaks the current dwarf2 parsers/readers. I think it is worth filing a bug. http://gcc.gnu.org/viewcvs/trunk/gcc/dwarf2out.c?r1=171846&r2=171852&diff_format=h Secondly, in gcc4.5.1, the directive (.loc) is not emitted and still we are able to map line numbers to address. Please help me understand how introducing .loc directive affects debug_line format in gcc 4.6.1. Thanks -- Anitha
