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[ Upstream commit61f2b7c749] 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 commit866ced950b("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@gmail.com/ Link: https://lore.kernel.org/lkml/CAK7LNARPAmsJD5XKAw7m_X2g7Fi-CAAsWDQiP7+ANBjkg7R7ng@mail.gmail.com/ Link: https://reviews.llvm.org/D80391 Cc: Andi Kleen <ak@linux.intel.com> Reported-by: Dmitrii Bundin <dmitrii.bundin.a@gmail.com> Reported-by: Fangrui Song <maskray@google.com> Reported-by: Masahiro Yamada <masahiroy@kernel.org> Suggested-by: Dmitrii Bundin <dmitrii.bundin.a@gmail.com> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Stable-dep-of:32ef9e5054("Makefile.debug: re-enable debug info for .S files") Signed-off-by: Sasha Levin <sashal@kernel.org>
32 lines
685 B
Makefile
32 lines
685 B
Makefile
DEBUG_CFLAGS := -g
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ifdef CONFIG_DEBUG_INFO_SPLIT
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DEBUG_CFLAGS += -gsplit-dwarf
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endif
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ifndef CONFIG_AS_IS_LLVM
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KBUILD_AFLAGS += -Wa,-gdwarf-2
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endif
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ifndef CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT
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dwarf-version-$(CONFIG_DEBUG_INFO_DWARF4) := 4
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dwarf-version-$(CONFIG_DEBUG_INFO_DWARF5) := 5
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DEBUG_CFLAGS += -gdwarf-$(dwarf-version-y)
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endif
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ifdef CONFIG_DEBUG_INFO_REDUCED
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DEBUG_CFLAGS += -fno-var-tracking
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ifdef CONFIG_CC_IS_GCC
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DEBUG_CFLAGS += -femit-struct-debug-baseonly
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endif
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endif
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ifdef CONFIG_DEBUG_INFO_COMPRESSED
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DEBUG_CFLAGS += -gz=zlib
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KBUILD_AFLAGS += -gz=zlib
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KBUILD_LDFLAGS += --compress-debug-sections=zlib
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endif
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KBUILD_CFLAGS += $(DEBUG_CFLAGS)
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export DEBUG_CFLAGS
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