CONFIG_DEBUG_INFO_SPLIT and CONFIG_DEBUG_INFO_DWARF4 enable extra dwarf options if supported. You never know if they are really enabled since Makefile may silently turn them off. The actual behavior will match to the kernel configuration by testing those compiler flags in the Kconfig stage. Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx> --- Makefile | 4 ++-- lib/Kconfig.debug | 2 ++ 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/Makefile b/Makefile index bf4e77b..0f86257 100644 --- a/Makefile +++ b/Makefile @@ -735,14 +735,14 @@ DEBUG_CFLAGS := $(call cc-option, -fno-var-tracking-assignments) ifdef CONFIG_DEBUG_INFO ifdef CONFIG_DEBUG_INFO_SPLIT -DEBUG_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) +DEBUG_CFLAGS += -gsplit-dwarf else DEBUG_CFLAGS += -g endif KBUILD_AFLAGS += -Wa,-gdwarf-2 endif ifdef CONFIG_DEBUG_INFO_DWARF4 -DEBUG_CFLAGS += $(call cc-option, -gdwarf-4,) +DEBUG_CFLAGS += -gdwarf-4 endif ifdef CONFIG_DEBUG_INFO_REDUCED diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index d4df5b2..dfc9949 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -179,6 +179,7 @@ config DEBUG_INFO_REDUCED config DEBUG_INFO_SPLIT bool "Produce split debuginfo in .dwo files" depends on DEBUG_INFO + depends on $(cc-option,-gsplit-dwarf) help Generate debug info into separate .dwo files. This significantly reduces the build directory size for builds with DEBUG_INFO, @@ -194,6 +195,7 @@ config DEBUG_INFO_SPLIT config DEBUG_INFO_DWARF4 bool "Generate dwarf4 debuginfo" depends on DEBUG_INFO + depends on $(cc-option,-gdwarf-4) help Generate dwarf4 debug info. This requires recent versions of gcc and gdb. It makes the debug information larger. -- 2.7.4
