Building libgcc with debug info

[Chung-Ju Wu]

On 7/20/13 2:13 AM, Dan Schatzberg wrote:
> Hi jasonwucj,
>
> I actually see my CFLAGS variables being used as expected, but no
> debug information is generated. If I pass CFLAGS=-gstabs I actually do
> get debug info, just not with -g. Why won't it produce dwarf debug
> information for libgcc?
> ---
> Dan Schatzberg
>

Hi, Dan,

I suggest you can try setting HOST_LIBGCC2_CFLAGS first,
see if it does achieve your requirement.

To figure out why it doesn't produce dwarf debug information,
I think it would be good to preserve your libgcc building process
(e.g. make all-target-libgcc | tee make-log).

Then, check the process to understand how it issues options to compile
libgcc stuff, comparing the options against the variables in libgcc/Makefile.in,
especially the variables CFLAGS, LIBGCC2_DEBUG_CFLAGS, LIBGCC2_CFLAGS,
HOST_LIBGCC2_CFLAGS, and INTERNAL_CFLAGS, I believe you will find out
why it is not good to set -g3 in CFLAGS for building libgcc. :)


Best regards,
jasonwucj