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| author | Sami Tolvanen <samitolvanen@google.com> | 2019-04-10 14:17:20 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2021-02-23 12:46:58 -0800 |
| commit | b33fff07e3e3817d94dbec7bf2040070ecd96d16 (patch) | |
| tree | 0630706a267af3a9f728d1ba3fe2b6e74b4dfbad /arch/x86/Makefile | |
| parent | d2dcd3e37475a66012f9702c4f9f0863ccdae716 (diff) | |
x86, build: allow LTO to be selected
Pass code model and stack alignment to the linker as these are not
stored in LLVM bitcode, and allow CONFIG_LTO_CLANG* to be enabled.
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'arch/x86/Makefile')
| -rw-r--r-- | arch/x86/Makefile | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/Makefile b/arch/x86/Makefile index 7116da3980be..845baf58d147 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -166,6 +166,11 @@ ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1) KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args,) endif +ifdef CONFIG_LTO_CLANG +KBUILD_LDFLAGS += -plugin-opt=-code-model=kernel \ + -plugin-opt=-stack-alignment=$(if $(CONFIG_X86_32),4,8) +endif + # Workaround for a gcc prelease that unfortunately was shipped in a suse release KBUILD_CFLAGS += -Wno-sign-compare # |