When generating code with -mno-relax, GCC puts .option norelax in
the generated assembly, and so doesn’t bother passing on -mno-relax
to the assembler. This has the unfortunate effect that, when using
GCC to assemble hand-written assembly, -mno-relax does nothing,
and we have to pass -Wa,-mno-relax to manually forward it to the
assembler.
This is an old GCC bug that was fixed [1] recently. For the time
being, let's pass "-Wa,-mno-relax" to ASFLAGS for the GCC + LLD
combination to work, e.g.:
$ make CC=riscv64-unknown-elf-gcc LLVM=1 PLATFORM=generic
[1] https://github.com/gcc-mirror/gcc/commit/
3b0a7d624e64eeb81e4d5e8c62c46d86ef521857
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
ASFLAGS += -mabi=$(PLATFORM_RISCV_ABI) -march=$(PLATFORM_RISCV_ISA)
ASFLAGS += -mcmodel=$(PLATFORM_RISCV_CODE_MODEL)
ASFLAGS += $(RELAX_FLAG)
+ifneq ($(CC_IS_CLANG),y)
+ifneq ($(RELAX_FLAG),)
+ASFLAGS += -Wa,$(RELAX_FLAG)
+endif
+endif
ASFLAGS += $(GENFLAGS)
ASFLAGS += $(platform-asflags-y)
ASFLAGS += $(firmware-asflags-y)