From: Fangrui Song <maskray@xxxxxxxxxx>
commit 3cebf80e9a0d3adcb174053be32c88a640b3344b upstream.
lld since llvm:6611d58f5bbc ("[ELF] Relax R_RISCV_ALIGN"), which will be
included in the 15.0.0 release, has implemented some RISC-V linker
relaxation. -mno-relax is no longer needed in
KBUILD_CFLAGS/KBUILD_AFLAGS to suppress R_RISCV_ALIGN which older lld
can not handle:
ld.lld: error: capability.c:(.fixup+0x0): relocation R_RISCV_ALIGN
requires unimplemented linker relaxation; recompile with -mno-relax
but the .o is already compiled with -mno-relax
Signed-off-by: Fangrui Song <maskray@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220710071117.446112-1-maskray@xxxxxxxxxx/
Link: https://lore.kernel.org/r/20220918092933.19943-1-palmer@xxxxxxxxxxxx
Reviewed-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Tested-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Tested-by: Nathan Chancellor <nathan@xxxxxxxxxx>
Tested-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/riscv/Makefile | 2 ++
1 file changed, 2 insertions(+)
--- a/arch/riscv/Makefile
+++ b/arch/riscv/Makefile
@@ -37,6 +37,7 @@ else
endif
ifeq ($(CONFIG_LD_IS_LLD),y)
+ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 150000; echo $$?),0)
KBUILD_CFLAGS += -mno-relax
KBUILD_AFLAGS += -mno-relax
ifndef CONFIG_AS_IS_LLVM
@@ -44,6 +45,7 @@ ifndef CONFIG_AS_IS_LLVM
KBUILD_AFLAGS += -Wa,-mno-relax
endif
endif
+endif
# ISA string setting
riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima
