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| author |   Nathan Chancellor <nathan@kernel.org> | 2021-03-25 17:04:35 -0700 |
|---|---|---|
| committer |   Borislav Petkov <bp@suse.de> | 2021-03-26 11:34:58 +0100 |
| commit | 58d746c119dfa28e72fc35aacaf3d2a3ac625cd0 (patch) | |
| tree | c871bff71ce4f2f02d03d6cf1ef4e4f1ddb7ef7f /drivers/firmware/efi | |
| parent | x86/boot: Add $(CLANG_FLAGS) to compressed KBUILD_CFLAGS (diff) | |
| download | linux-dev-58d746c119dfa28e72fc35aacaf3d2a3ac625cd0.tar.xz linux-dev-58d746c119dfa28e72fc35aacaf3d2a3ac625cd0.zip | |
efi/libstub: Add $(CLANG_FLAGS) to x86 flags
When cross compiling x86 on an ARM machine with clang, there are several
errors along the lines of:
arch/x86/include/asm/page_64.h:52:7: error: invalid output constraint '=D' in asm
This happens because the x86 flags in the EFI stub are not derived from
KBUILD_CFLAGS like the other architectures are and the clang flags that
set the target architecture ('--target=') and the path to the GNU cross
tools ('--prefix=') are not present, meaning that the host architecture
is targeted.
These flags are available as $(CLANG_FLAGS) from the main Makefile so
add them to the cflags for x86 so that cross compiling works as expected.
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lkml.kernel.org/r/20210326000435.4785-4-nathan@kernel.org
Diffstat (limited to 'drivers/firmware/efi')
| -rw-r--r-- | drivers/firmware/efi/libstub/Makefile | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile index c23466e05e60..d0537573501e 100644 --- a/drivers/firmware/efi/libstub/Makefile +++ b/drivers/firmware/efi/libstub/Makefile @@ -13,7 +13,8 @@ cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ \ -Wno-pointer-sign \ $(call cc-disable-warning, address-of-packed-member) \ $(call cc-disable-warning, gnu) \ - -fno-asynchronous-unwind-tables + -fno-asynchronous-unwind-tables \ + $(CLANG_FLAGS) # arm64 uses the full KBUILD_CFLAGS so it's necessary to explicitly # disable the stackleak plugin |