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https://github.com/thead-yocto-mirror/meta-riscv
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This packages bluetooth/Wifi firmware blobs into a package Help lld linker Use -mno-relax to compile the kernel with clang when using lld for linker ( with LLVM=1 ) Signed-off-by: Khem Raj <raj.khem@gmail.com>
52 lines
1.7 KiB
Diff
52 lines
1.7 KiB
Diff
From b49fbbed96b6e5d898377020d6b717a21aad6282 Mon Sep 17 00:00:00 2001
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From: Khem Raj <raj.khem@gmail.com>
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Date: Fri, 14 May 2021 00:23:05 -0700
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Subject: [PATCH v2] riscv: Use -mno-relax when using lld linker
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lld does not implement the RISCV relaxation optimizations like GNU ld
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therefore disable it when building with lld, Also pass it to
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assembler when using external GNU assembler ( LLVM_IAS != 1 ), this
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ensures that relevant assembler option is also enabled along. if these
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options are not used then we see following relocations in objects
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0000000000000000 R_RISCV_ALIGN *ABS*+0x0000000000000002
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These are then rejected by lld
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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
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Signed-off-by: Khem Raj <raj.khem@gmail.com>
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Cc: Paul Walmsley <paul.walmsley@sifive.com>
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Cc: Palmer Dabbelt <palmer@dabbelt.com>
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Cc: Albert Ou <aou@eecs.berkeley.edu>
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Cc: Nathan Chancellor <nathan@kernel.org>
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Cc: Nick Desaulniers <ndesaulniers@google.com>
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---
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v2: Use CONFIG_LD_IS_LLD instead of LLVM check
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arch/riscv/Makefile | 9 +++++++++
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1 file changed, 9 insertions(+)
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diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
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index 3eb9590a0775..4be020695428 100644
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--- a/arch/riscv/Makefile
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+++ b/arch/riscv/Makefile
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@@ -38,6 +38,15 @@ else
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KBUILD_LDFLAGS += -melf32lriscv
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endif
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+ifeq ($(CONFIG_LD_IS_LLD),y)
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+ KBUILD_CFLAGS += -mno-relax
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+ KBUILD_AFLAGS += -mno-relax
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+ifneq ($(LLVM_IAS),1)
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+ KBUILD_CFLAGS += -Wa,-mno-relax
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+ KBUILD_AFLAGS += -Wa,-mno-relax
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+endif
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+endif
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+
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# ISA string setting
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riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima
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riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima
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--
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2.31.1
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