[PATCH v5 20/29] efi/libstub: disable LTO
From: Sami Tolvanen <samitolvanen@google.com>
Date: 2020-10-09 16:15:04
Also in:
linux-arch, linux-kbuild, linux-pci, lkml
Subsystem:
extensible firmware interface (efi), the rest · Maintainers:
Ard Biesheuvel, Linus Torvalds
With CONFIG_LTO_CLANG, we produce LLVM bitcode instead of ELF object files. Since LTO is not really needed here and the Makefile assumes we produce an object file, disable LTO for libstub. Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Reviewed-by: Kees Cook <redacted> --- drivers/firmware/efi/libstub/Makefile | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile
index 0c911e391d75..e927876f3a05 100644
--- a/drivers/firmware/efi/libstub/Makefile
+++ b/drivers/firmware/efi/libstub/Makefile@@ -36,6 +36,8 @@ KBUILD_CFLAGS := $(cflags-y) -Os -DDISABLE_BRANCH_PROFILING \ # remove SCS flags from all objects in this directory KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_SCS), $(KBUILD_CFLAGS)) +# disable LTO +KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_LTO), $(KBUILD_CFLAGS)) GCOV_PROFILE := n # Sanitizer runtimes are unavailable and cannot be linked here.
--
2.28.0.1011.ga647a8990f-goog
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