Adds config options to control debug info level and producing of macro definitions for GCC/Clang. Option DEBUG_INFO_LEVEL is responsible for controlling debug info level. Before GCC 11 and Clang 12 -gsplit-dwarf implicitly uses -g2. To provide a way to override the setting with, e.g. -g1, DEBUG_INFO_LEVEL is set independently from DEBUG_INFO_SPLIT. Option DEBUG_MACRO_DEFINITIONS is responsible for controlling inclusion of macro definitions. Since Clang uses -fdebug-macro to control if macro definitions are produced which is different from GCC, provides a compiler-specific way of handling macro inclusion. The option is handled after DEBUG_INFO_LEVEL since -g3 -g2 implies -g2, but -g2 -g3 implies -g3 and GCC uses -g3 to produce macro definitions. Signed-off-by: Dmitrii Bundin <dmitrii.bundin.a@xxxxxxxxx> --- Changes in v2: https://lore.kernel.org/all/20220804223504.4739-1-dmitrii.bundin.a@xxxxxxxxx/ - Replace hardcoded -g3 with a configurable debug info level Changes in v3: https://lore.kernel.org/all/20220814002021.16990-1-dmitrii.bundin.a@xxxxxxxxx/ - Make -g<level> and -gdwarf-split to be set independently - Add a separate option to control macro definitions for GCC/Clang lib/Kconfig.debug | 20 ++++++++++++++++++++ scripts/Makefile.debug | 12 ++++++++++-- 2 files changed, 30 insertions(+), 2 deletions(-) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 2e24db4bff19..ace6f2eddb56 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -304,6 +304,26 @@ config DEBUG_INFO_REDUCED DEBUG_INFO build and compile times are reduced too. Only works with newer gcc versions. +config DEBUG_INFO_LEVEL + int "Debug info level" + range 1 3 + default "2" + help + Sets the level of how much debug information to generate (-glevel). + Level 1 produces minimal debug information without including information + about local variables. Level 3 includes extra information like macro + definitions. Setting up level 3 will require significantly more disk + space and increase built time. + +config DEBUG_MACRO_DEFINITIONS + bool "Add macro definitions to debug info" + default n + help + Generates macro definitions to provide a way to expand macros right + in the debugging session. This information can be used with macro expand, + info macro in gdb. This option is equivalent to setting -g3 in GCC and + -fdebug-macro in Clang. + config DEBUG_INFO_COMPRESSED bool "Compressed debugging information" depends on $(cc-option,-gz=zlib) diff --git a/scripts/Makefile.debug b/scripts/Makefile.debug index 9f39b0130551..29cd04234e75 100644 --- a/scripts/Makefile.debug +++ b/scripts/Makefile.debug @@ -2,8 +2,6 @@ DEBUG_CFLAGS := ifdef CONFIG_DEBUG_INFO_SPLIT DEBUG_CFLAGS += -gsplit-dwarf -else -DEBUG_CFLAGS += -g endif ifndef CONFIG_AS_IS_LLVM @@ -16,6 +14,16 @@ dwarf-version-$(CONFIG_DEBUG_INFO_DWARF5) := 5 DEBUG_CFLAGS += -gdwarf-$(dwarf-version-y) endif +DEBUG_CFLAGS += -g$(CONFIG_DEBUG_INFO_LEVEL) +ifdef CONFIG_DEBUG_MACRO_DEFINITIONS +ifdef CONFIG_CC_IS_GCC +DEBUG_CFLAGS += -g3 +endif +ifdef CONFIG_CC_IS_CLANG +DEBUG_CFLAGS += -fdebug-macro +endif +endif + ifdef CONFIG_DEBUG_INFO_REDUCED DEBUG_CFLAGS += -fno-var-tracking ifdef CONFIG_CC_IS_GCC -- 2.17.1
