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| author | Bin Meng <bmeng.cn@gmail.com> | 2021-07-12 10:12:53 +0800 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2021-07-27 14:29:31 +0530 |
| commit | 989039117fc0181bb971acf2c934d3fba454c153 (patch) | |
| tree | 9247686d08cf28f043c4d7b023b536bdf0f08d52 | |
| parent | 81eb7088b6ae1b3b14ed57ef428b1b9f74d468cf (diff) | |
Makefile: Manually forward RELAX_FLAG to the assembler when linking with LLD
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>
| -rw-r--r-- | Makefile | 5 |
1 files changed, 5 insertions, 0 deletions
@@ -272,6 +272,11 @@ ASFLAGS += -mno-save-restore -mstrict-align 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) |