Basic Block info in DWARF line number table

[Yuë Liu]

Hello,

>From DWARF standard I read that basic block info can also be stored in
DWARF line number tables so that a DWARF consumer can match basic
blocks with the machine code addresses. And I found in gcc 3.x there
is an option "-a" to support output basic block information. However,
in gcc 4.x this option is no longer available and I cannot find any
basic lock info in line number tables through dwarfdump. Do gcc still
record this information? What command line option is needed to enable
this?

Thanks,
Yue Liu