The following commit has been merged into the x86/build branch of tip: Commit-ID: d5cbd80e302dfea59726c44c56ab7957f822409f Gitweb: https://git.kernel.org/tip/d5cbd80e302dfea59726c44c56ab7957f822409f Author: Nathan Chancellor <nathan@xxxxxxxxxx> AuthorDate: Thu, 25 Mar 2021 17:04:34 -07:00 Committer: Borislav Petkov <bp@xxxxxxx> CommitterDate: Fri, 26 Mar 2021 11:32:55 +01:00 x86/boot: Add $(CLANG_FLAGS) to compressed KBUILD_CFLAGS When cross compiling x86 on an ARM machine with clang, there are several errors along the lines of: arch/x86/include/asm/string_64.h:27:10: error: invalid output constraint '=&c' in asm This happens because the compressed boot Makefile reassigns KBUILD_CFLAGS and drops the clang flags that set the target architecture ('--target=') and the path to the GNU cross tools ('--prefix='), meaning that the host architecture is targeted. These flags are available as $(CLANG_FLAGS) from the main Makefile so add them to the compressed boot folder's KBUILD_CFLAGS so that cross compiling works as expected. Signed-off-by: Nathan Chancellor <nathan@xxxxxxxxxx> Signed-off-by: Borislav Petkov <bp@xxxxxxx> Acked-by: Ard Biesheuvel <ardb@xxxxxxxxxx> Link: https://lkml.kernel.org/r/20210326000435.4785-3-nathan@xxxxxxxxxx --- arch/x86/boot/compressed/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile index e0bc398..6e5522a 100644 --- a/arch/x86/boot/compressed/Makefile +++ b/arch/x86/boot/compressed/Makefile @@ -46,6 +46,7 @@ KBUILD_CFLAGS += -D__DISABLE_EXPORTS # Disable relocation relaxation in case the link is not PIE. KBUILD_CFLAGS += $(call as-option,-Wa$(comma)-mrelax-relocations=no) KBUILD_CFLAGS += -include $(srctree)/include/linux/hidden.h +KBUILD_CFLAGS += $(CLANG_FLAGS) # sev-es.c indirectly inludes inat-table.h which is generated during # compilation and stored in $(objtree). Add the directory to the includes so
![]() |