On Wed, Jun 10, 2020 at 03:14:46PM +0800, Zhenzhong Duan wrote: > Got below error during build: > > In file included from drivers/firmware/efi/libstub/efi-stub-helper.c:16:0: > drivers/firmware/efi/libstub/efi-stub-helper.c: In function ‘efi_char16_puts’: > arch/x86/include/asm/efi.h:355:3: sorry, unimplemented: ms_abi attribute requires -maccumulate-outgoing-args or subtarget optimization implying it > : __efi64_thunk_map(inst, func, inst, ##__VA_ARGS__)) > ^ > drivers/firmware/efi/libstub/efi-stub-helper.c:37:2: note: in expansion of macro ‘efi_call_proto’ > efi_call_proto(efi_table_attr(efi_system_table, con_out), > ^ > drivers/firmware/efi/libstub/efi-stub-helper.c:37: confused by earlier errors, bailing out > > Fix it by adding -maccumulate-outgoing-args for efi libstub build > as suggested by gcc. > > Signed-off-by: Zhenzhong Duan <zhenzhong.duan@xxxxxxxxx> > --- > drivers/firmware/efi/libstub/Makefile | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile > index cce4a74..25e5d02 100644 > --- a/drivers/firmware/efi/libstub/Makefile > +++ b/drivers/firmware/efi/libstub/Makefile > @@ -6,7 +6,7 @@ > # enabled, even if doing so doesn't break the build. > # > cflags-$(CONFIG_X86_32) := -march=i386 > -cflags-$(CONFIG_X86_64) := -mcmodel=small > +cflags-$(CONFIG_X86_64) := -mcmodel=small -maccumulate-outgoing-args This will need a cc-option call if this patch is necessary because clang does not support this flag. clang-11: error: unknown argument: '-maccumulate-outgoing-args' > cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ \ > -fPIC -fno-strict-aliasing -mno-red-zone \ > -mno-mmx -mno-sse -fshort-wchar \ > -- > 1.8.3.1 > Cheers, Nathan
