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Message-Id: <20220804223504.4739-1-dmitrii.bundin.a@gmail.com>
Date: Fri, 5 Aug 2022 01:35:04 +0300
From: Dmitrii Bundin <dmitrii.bundin.a@...il.com>
To: masahiroy@...nel.org
Cc: michal.lkml@...kovi.net, ndesaulniers@...gle.com,
akpm@...ux-foundation.org, nathan@...nel.org, peterz@...radead.org,
keescook@...omium.org, jpoimboe@...nel.org,
dan.j.williams@...el.com, isabbasso@...eup.net,
edumazet@...gle.com, vbabka@...e.cz, linux@...musvillemoes.dk,
linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org,
Dmitrii Bundin <dmitrii.bundin.a@...il.com>
Subject: [PATCH] kbuild: add option to set max level of debug info
When compiling with -g3 option and debugging with gdb it provides some
extra abilities like macro expand, info macro etc... It's sometimes
useful to unerstand behavior of complicated macros.
Signed-off-by: Dmitrii Bundin <dmitrii.bundin.a@...il.com>
---
lib/Kconfig.debug | 9 +++++++++
scripts/Makefile.debug | 2 ++
2 files changed, 11 insertions(+)
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 2e24db4bff19..1e8bef3e2a95 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -304,6 +304,15 @@ config DEBUG_INFO_REDUCED
DEBUG_INFO build and compile times are reduced too.
Only works with newer gcc versions.
+config DEBUG_INFO_MAXLEVEL
+ bool "Maximum debug information level"
+ depends on !DEBUG_INFO_REDUCED
+ default n
+ help
+ Sets the maximum level of debug information compilers may generate
+ (-g3). Enabling this option will require significantly more disk space
+ and increase built time, but it's useful for debugging purposes.
+
config DEBUG_INFO_COMPRESSED
bool "Compressed debugging information"
depends on $(cc-option,-gz=zlib)
diff --git a/scripts/Makefile.debug b/scripts/Makefile.debug
index 9f39b0130551..7e1d8beecfc4 100644
--- a/scripts/Makefile.debug
+++ b/scripts/Makefile.debug
@@ -2,6 +2,8 @@ DEBUG_CFLAGS :=
ifdef CONFIG_DEBUG_INFO_SPLIT
DEBUG_CFLAGS += -gsplit-dwarf
+else ifdef CONFIG_DEBUG_INFO_MAXLEVEL
+DEBUG_CFLAGS += -g3
else
DEBUG_CFLAGS += -g
endif
--
2.17.1
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