[PATCH AUTOSEL 5.19 29/29] Makefile.debug: set -g unconditional on CONFIG_DEBUG_INFO_SPLIT

From: Sasha Levin
Date: Sun Oct 02 2022 - 18:53:35 EST

From: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>

[ Upstream commit 61f2b7c7497ba96cdde5bbaeb9e07f4c48f41f97 ]

Dmitrii, Fangrui, and Mashahiro note:

Before GCC 11 and Clang 12 -gsplit-dwarf implicitly uses -g2.

Fix CONFIG_DEBUG_INFO_SPLIT for gcc-11+ & clang-12+ which now need -g
specified in order for -gsplit-dwarf to work at all.

-gsplit-dwarf has been mutually exclusive with -g since support for
CONFIG_DEBUG_INFO_SPLIT was introduced in
commit 866ced950bcd ("kbuild: Support split debug info v4")
I don't think it ever needed to be.

Link: https://lore.kernel.org/lkml/20220815013317.26121-1-dmitrii.bundin.a@xxxxxxxxx/
Link: https://lore.kernel.org/lkml/CAK7LNARPAmsJD5XKAw7m_X2g7Fi-CAAsWDQiP7+ANBjkg7R7ng@xxxxxxxxxxxxxx/
Link: https://reviews.llvm.org/D80391
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Reported-by: Dmitrii Bundin <dmitrii.bundin.a@xxxxxxxxx>
Reported-by: Fangrui Song <maskray@xxxxxxxxxx>
Reported-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Suggested-by: Dmitrii Bundin <dmitrii.bundin.a@xxxxxxxxx>
Reviewed-by: Nathan Chancellor <nathan@xxxxxxxxxx>
Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
scripts/Makefile.debug | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/scripts/Makefile.debug b/scripts/Makefile.debug
index 9f39b0130551..26d6a9d97a20 100644
--- a/scripts/Makefile.debug
+++ b/scripts/Makefile.debug
@@ -1,9 +1,7 @@

DEBUG_CFLAGS += -gsplit-dwarf