On Wed, Oct 14, 2020 at 01:01:32PM +0200, Mark Wielaard wrote: > Some old GCC versions between 4.5.0 and 4.9.1 might miscompile code > with -fvar-tracking-assingments (which is enabled by default with -g -O2). > commit 2062afb4f added -fno-var-tracking-assignments unconditionally to > work around this. But newer versions of GCC no longer have this bug, so > only add it for versions of GCC before 5.0.
Add ... This allows various tools such as a perf probe or gdb debuggers or systemtap to resolve variable locations using dwarf locations in more code. > > Signed-off-by: Mark Wielaard <m...@klomp.org> > Acked-by: Ian Rogers <irog...@google.com> > Cc: linux-toolcha...@vger.kernel.org > Cc: Andi Kleen <a...@firstfloor.org> > Cc: Nick Desaulniers <ndesaulni...@google.com> > Cc: Segher Boessenkool <seg...@kernel.crashing.org> > Cc: Florian Weimer <f...@deneb.enyo.de> Reviewed-by: Andi Kleen <a...@linux.intel.com> -Andi
