On 2014-07-30 01:11, Andi Kleen wrote: > From: Andi Kleen <ak@xxxxxxxxxxxxxxx> > > I found that a lot of unresolvable variables when using gdb on the kernel > become resolvable when dwarf4 is enabled. So add a Kconfig flag to enable it. > > It definitely increases the debug information size, but on the other > hand this isn't so bad when debug fusion is used. > > Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx> > --- > Makefile | 3 +++ > lib/Kconfig.debug | 9 +++++++++ > 2 files changed, 12 insertions(+) > > diff --git a/Makefile b/Makefile > index 6a717cd..6cdf3f0 100644 > --- a/Makefile > +++ b/Makefile > @@ -696,6 +696,9 @@ KBUILD_CFLAGS += -g > endif > KBUILD_AFLAGS += -Wa,-gdwarf-2 > endif > +ifdef CONFIG_DEBUG_INFO_DWARF4 > +KBUILD_CFLAGS += -gdwarf-4 > +endif Make it $(call cc-option,-gdwarf-4), so as not to break allmodconfig with older GCCs. Otherwise the patch is OK. Michal -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
