diff options
| author | Masahiro Yamada <masahiroy@kernel.org> | 2025-01-31 23:04:01 +0900 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2025-02-01 04:28:05 +0900 |
| commit | 695ed93bb30e03e9f826ee70abdd83f970741a37 (patch) | |
| tree | 3ded5ccff06562c0f0414e8215c0185b238a067a /scripts/Makefile.build | |
| parent | kbuild: Strip runtime const RELA sections correctly (diff) | |
| download | linux-695ed93bb30e03e9f826ee70abdd83f970741a37.tar.gz linux-695ed93bb30e03e9f826ee70abdd83f970741a37.zip | |
kbuild: fix Clang LTO with CONFIG_OBJTOOL=n
Since commit bede169618c6 ("kbuild: enable objtool for *.mod.o and
additional kernel objects"), Clang LTO builds do not perform any
optimizations when CONFIG_OBJTOOL is disabled (e.g., for ARCH=arm64).
This is because every LLVM bitcode file is immediately converted to
ELF format before the object files are linked together.
This commit fixes the breakage.
Fixes: bede169618c6 ("kbuild: enable objtool for *.mod.o and additional kernel objects")
Reported-by: Yonghong Song <yonghong.song@linux.dev>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Yonghong Song <yonghong.song@linux.dev>
Diffstat (limited to 'scripts/Makefile.build')
| -rw-r--r-- | scripts/Makefile.build | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build index 81d9dacad03c..993708d11874 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -194,7 +194,9 @@ endif # CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT is-standard-object = $(if $(filter-out y%, $(OBJECT_FILES_NON_STANDARD_$(target-stem).o)$(OBJECT_FILES_NON_STANDARD)n),$(is-kernel-object)) +ifdef CONFIG_OBJTOOL $(obj)/%.o: private objtool-enabled = $(if $(is-standard-object),$(if $(delay-objtool),$(is-single-obj-m),y)) +endif ifneq ($(findstring 1, $(KBUILD_EXTRA_WARN)),) cmd_warn_shared_object = $(if $(word 2, $(modname-multi)),$(warning $(kbuild-file): $*.o is added to multiple modules: $(modname-multi))) |